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Publication List  (Link for my papers only page)
Revised on  Jan 3rd  2017   https://www.researchgate.net/profile/Sang_Gu_Lee   6.8k Read, 3610 Download, 438 Citations, 11 H-index, 27.16 RG   orcid.org/0000-0002-7408-9648, Researcher M-2781-2015 Scopus Author 35292447100 

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Items Authored by Lee, Sang-Gu.  http://www.ams.org/mathscinet/search/author.html?mrauthid=319424 , Total Citations: cited 199 times by 218 authors in the MR Citation Database


[159] Sang-Gu Lee, Jae Hwa Lee*, Kyung-Eun Park,대화형 수학 디지털교과서 개발과 활용 사례 연구- 선형대수학을 중심으로-, 'Development and Usage of Interactive Digital Linear Algebra Textbook', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,韓國數學敎育學會誌 시리즈 E <數學敎育 論文集, Vol. 31, No. 2, June. 2017. ***-***,(KCI-A)

[158] Sang-Gu Lee*, Jae Hwa Lee, Yeung-Gu Kim, Kang Sup Lee, Yoonmee Ham, 한국 근현대수학 교재 연구 - Mathematics Textbook in Korea (1880-2016)', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 31, No. 1, Feb. 2017. 149-177.  (KCI-A)

[157] Sang-Gu Lee, Kyung-Eun Park*, Yoonmee Ham, 시각장애청소년을 위한 3D 프린팅 촉각수학교재 개발 연구- 함수 지도와 관련하여 - A Study on 3D Printed Tactile mathematics textbook for Visually Impaired Students', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 30, No. 4, Nov. 2016. 515-530.  (KCI-A)

[156] Ajit KUMAR, Sang-Gu LEE*, Ashraf SHARFUDEEN, Application of Progressive Discovery as a Teaching Aid Using MathDisk, Electronic Journal of Mathematics & Technology (eJMT)  https://php.radford.edu/~ejmt/ContentIndex.php V.10, No. 1, p.1-10, 2016.  ISSN 1933-2823. and (Invited paper in) Research Journal of Mathematics & Technology (RJMT) Vol. 5, No. 1 (June 2016), 33-42.

[155] Sang-Gu Lee, Jae Hwa Lee*, Jun H. Park, Eung-Ki Kim, SageMath를 활용한 대화형 공학수학 실습실의 개발과 활용 - Interactive Engineering Mathematics Laboratory', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 30, No. 3, Sep. 2016. 281-294.  (KCI-A)

[154] Yoonmee Ham and Sang-Gu LEE*,  Interactive dynamics in a bistable attraction-repulsion chemotaxis system, Korean J. Math. 24 (2016), No. 2, pp.  215-233.    (KCI).

[153] Sang-Gu Lee*, Victoria Lang, Jae Hwa Lee, Zombie Population Modeling, Electronic Journal of Mathematics & Technology (eJMT)  https://php.radford.edu/~ejmt/ContentIndex.php V.10, No. 2, p.25-34, June 2016.  ISSN 1933-2823.

[152] Kyung-Eun Park, Sang-Gu Lee*,선형대수학’ 플립드러닝(Flipped Learning) 강의 모델 설계 및 적용', 'Flipped Learning teaching model design and application for the University's Linear Algebra', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 30, No. 1, Feb. 2016. 1-22.  (KCI-A)

[151] Sang-Gu Lee, Mobile Linear Algebra with Sage , Selected Regular Lectures from the 12th International Congress on Mathematical Education, Springer, (Editor in Cheif: Sung Je Cho)   http://www.springer.com/gp/book/9783319171869, p.439-450, ISSN 1933-2823. ISBN 978-3-319-17186-9 ISBN 978-3-319-17187-6 (eBook), DOI 10.1007/978-3-319-17187-6 (2015)

[150] 고상숙, 고호경, 구나영, 김남희, 김리나, 김향숙, 김화경, 류희찬, 박만구, 손홍찬, 송민호, 윤인준, 이경화, 이상구*, 이종학, 이중권, 임해미, 장경윤, 전영국, 조정수, 채정림, 최경식, 한세호, 19장 수학과 컴퓨팅 사고력(CT), 수학교육에서 공학적 도구 - 대한수학교육학회 2015 연보, 경문사, http://kyungmoon.com/shop_product/shop_pdt_view.php?opt=new&p_idx=7989&page=1 , p.368-386, 2015.  ISSN 978-89-6105-950-3

[148] Sang-Gu Lee*, Geung-Hee Lee, Yong-Seok Choi, Jae Hwa Lee, Jenny Jyoung Lee, ‘R을 활용한 ‘대화형 통계학 입문 실습실’ 개발과 활용', 'Interactive Statistics Laboratory  using R and Sage', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 29, No. 4, Nov. 2015. 573-588.  (KCI-A)

[147] 박경은, Sang-Gu Lee*, ‘신체적-정신적 장애를 극복하고 학문적 기여를 한 수학자들과 특수수학교육의 환경변화 ', 'Mathematicians who overcomes their disabilities', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  韓國數學敎育學會誌 시리즈 E <數學敎育 論文集>, Vol. 29, No. 3, Sep. 2015. 331-352.  (KCI-A)

[146] Lee, Sang-Gu, Jin-WooPark*,  Sign idempotent sign pattern matrices that allow idempotence, Linear Algebra Appl. 487 (2015), 232–241.  (Accepted 2. Sep.) 15A86, SCI.

[145] Sang-Gu Lee, 이재화*, 최석정(崔錫鼎)의 산학연구와 양와집(養窩集)의 저자 이세구(李世龜), 'LEE Se-Gu, mathematical co-worker of CHOI Seok-Jeong', The Korean Journal for History of Mathematics, V.28, No. 2, p.73-83, April 2015. (KCI-A)

 [144] 박경은, Sang-Gu Lee*, ‘컴퓨팅 사고력(Computational thinking)’향상과 Sage 도구를 이용한 수학교육, 'Improving Computational Thinking Abilities Through the Teaching of Mathematics with Sage', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 29, No. 1, Jan. 2015. 19-33, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 제 29집 제 1호, 2015. 1. 19-33 (KCI-A). http://scholar.ndsl.kr/schDetail.do?cn=JAKO201506960267810 

 [143] Sang-Gu Lee*, 이재윤, 박경은, 이재화, 안승철, '수학과 예술을 3D 프린팅으로 연결하는 융합인재교육', 'Mathematics, Art and 3D-Printing in STEAM Education', J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 29, No. 1, Jan. 2015. 35-49, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 제 29집 제 1호, 2015. 1. 35-49(KCI-A). http://kiss.kstudy.com/journal/list_name.asp?key1=26735&key2=5011

 [142]  Victoria Lang, Sang-Gu Lee*, Jaeyoon Lee,  A Mobile, Open-source 2-D and 3-D Printing Graphic Creation C.A.S. Tool for Mathematics Courses, Journal of US-China Education Review A, Vol. 4, No. 8, 569-580, August 2014, ISSN2161-623X, USA, David Publishing Company. http://www.davidpublishing.com/journals_info.asp?jId=641

 [141] Sang-Gu Lee*, Ji-Eun Jang, Kyung-Won Kim,  Kyung-Eun Park, GeoGebra와 미분적분학 개념의 시각화, Visualization of Calculus Concepts with GeoGebra, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 28, No. 4, Nov. 2014. 457-474, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 제 28집 제 4, 2014. 11. 457-474(KCI-A). http://dx.doi.org/10.7468/jksmee.2014.28.3.317

 [140] Sang-Gu Lee*, Jae Hwa LEE, YoonMee Ham,  수학자 족보 프로젝트의 과거와 현재 그리고 한국, The history of Mathematics Genealogy Project and its meaning in Korea, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 28, No. 3, Sep. 2014. 317-333, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 제 28집 제 3호, 2014. 9. 317-333 (KCI-A). http://dx.doi.org/10.7468/jksmee.2014.28.3.317

 [139] 이재윤, 임영준, 박경은, Sang-Gu Lee*,  Sage를 활용한 수학 3D 프린팅 웹 도구 개발 - 대학 수학교육을 중심으로, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 28, No. 3, Sep. 2014. 381-394, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 제 28집 제 3호, 2014. 9. 381-394 (KCI-A). http://www.dbpia.co.kr/SKnowledge/ArticleDetail/2549777

 [138] MR3215241  Lee, Sang-Gu; Phong, Vu Quoc*. SIMULTANEOUS SOLUTIONS OF OPERATOR SYLVESTER EQUATIONS, Studia Mathematica, 222 (2014), 87-96. doi:10.4064/sm222-1-6, 11 pages, ISSN: 0039-3223(p) 1730-6337(e), SCI IF 0.6  (2014)

[137]  Kyung-Won Kim, Sang-Gu Lee*, Shaowei Sun, Modeling of Mobile Sage and Graphing Calculator, Journal of Modern Education Review, ISSN 2155-7993, USA, December 2013, Volume 3, No. 12, pp.918-925, Academic Star Publishing Company, 2013, http://www.academicstar.us.

 [136] Sang-Gu Lee, Joonkook Shin*, Kyung-Won Kim,  스토리텔링 수학 교과서에서 공학적 도구의 활용과 미분적분학 단원에 관한 개발 사례, A Case Study of Perceptions on Storytelling Mathematics Textbooks with Computer Algebra System, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,Vol. 28, No. 1, Feb. 2014. 65-79, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 28집 제 1, 2014. 2. 65-79 (KCI-A).

[135] MR3034492 Beasley, LeRoy B.;  Song, Seok-Zun;  Kang, Kyung-Tae;  Lee, Sang-Gu A comparison of term ranks of symmetric matrices and their preservers. Linear Algebra Appl. 438 (2013), no. 10, 3745–3754.  15A86, SCI.   PDF Clipboard Journal Article

[134] MR3143563 Ham, Yoonmee; Lee, Sang-Gu*; Phong, Vu Quoc. A HOPF BIFURCATION IN A THREE-COMPONENT REACTION-DIFFUSION SYSTEM WITH A CHEMOATTRACTION IN ONE DIMENSION, Abstract and Applied Analysis. Article ID 830386, 11 pages http://dx.doi.org/10.1155/2013/830386   SCI IF 1.32  (2013)

133. Sang-Gu LEE*, Kyung-Won KIM and Jae Hwa LEE,  Sage matrix calculator and full Sage contents for linear algebra, Sage 행렬계산기와 선형대수학 Sage 콘텐츠, Korean J. Math. 20 (2013), No. 4, pp.  503-521.    (KCI).

132. 이상구*,박종윤,김채식,이재화, 수학자 보재 이상설(李相卨)의 근대자연과학 수용- 백승호초(百勝胡艸)를 중심으로,  Sang-Seol Lee's manuscript on modern physics in the late 19th century Korea, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 27, No. 4, 487-498, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 27집 제 4호, 2013, 487-498, (KCI-A). http://dx.doi.org/10.7468/jksmee.2013.27.4.487

131. Sang-Gu Lee*, Kyung-Won Kim, 모바일 선형대수학 스마트폰 콘텐츠 개발과 활용, Development of smart-phone contents for mobile linear algebra, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 27, No. 2, 121-134, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 27집 제 2호, 2013. 121-134 (KCI-A).

130. Sang-Gu Lee*, 장지은 and Kyung-Won Kim, SageGeoGebra를 이용한 선형대수학 개념의 Visual-Dynamic 자료 개발과 활용, Visualization of Linear Algebra concepts with Sage and GeoGebra, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 27, No. 1, 1-17, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 27집 제 1호, 2013. 1-17 (KCI-A).

 [129] MR2954494 Reviewed Lee, Sang-Gu; Vu, Quoc-Phong Simultaneous solutions of matrix equations and simultaneous equivalence of matrices. Linear Algebra Appl. 437 (2012), no. 9, 2325–2339. 15A24 (15A21 47A13)

PDF Clipboard Journal Article, SCI

[128] Yongkeun SON, Chae Sik KIM, Sang-Gu LEE* and Jae Hwa LEE,  19th Century Chemistry Book of Korean Mathematician Sang-Seol LEE, 한국 근대수학교육의 아버지 李相卨이 쓴 19세기 근대화학 강의록 화학계몽초(化學啓蒙抄), Korean J. Math. 20 (2012), No. 4, pp. 541-563.  http://dx.doi.org/10.11568/kjm.2012.20.4.541  (KCI).

[127] Sang-Gu Lee*, Jae Hwa Lee and YoonMee Ham,   초기 선형대수학의 역사, Early History of Linear algebra, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 26, No. 4, 351-362, 韓國數學敎育學會誌 시리즈 E <數學敎育 論文集> 26집 제 4호, 2012. 351-362 (KCI-A).

[126] An Analysis of Recent Research on the Method of Excess and Deficit (Ying Nü and Ying Buzu Shu), 영륙과 盈不足術에 관한 최근 동서양의 연구 분석Sang-Gu Lee and Jae Hwa Lee, Korean J. Math. 20 (2012), No. 1, pp. 137-159.

[125] Ki-Won Chang, The first specialist on the history of Korean mathematics (최초의 한국수학사 전문가 張起元),  Sang-Gu Lee and Jae Hwa Lee, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 26, No. 1, 1-13, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 26집 제 1호, 2012. 2. 1-13. (KCI-A).

124. MR2810554 Reviewed Lee, Sang-Gu; Vu, Quoc-Phong Simultaneous solutions of Sylvester equations and idempotent matrices separating the joint spectrum. Linear Algebra Appl. 435 (2011), no. 9, 2097–2109. 15A24 (15A27 47A13 47A62) PDF Clipboard Journal Article, SCI

123. MR2829393 Reviewed Das, Kinkar Ch.; Bhatti, Faqir M.; Lee, Sang-Gu; Gutman, Ivan Spectral properties of the He matrix of hexagonal systems. MATCH Commun. Math. Comput. Chem. 65 (2011), no. 3, 753–774. (Reviewer: Rong Si Chen) 05C50 (05C90) SCI PDF Clipboard Journal  Article

122. MR2794143 Reviewed Ham, Yoonmee; Lee, Sang-Gu; Phong, Vu Quoc Characterization of the determinant of a Laguerre matrix. J. Appl. Math. Comput. 36 (2011), no. 1-2, 233–239. (Reviewer: Peter Szabó) 65H05 (15B05) PDF Clipboard Journal Article

121. 安鍾和의 수학책 <數學節要> 연구, 이상구*, 이재화, 변형우, <A study on An abridged version of the Joseon Mathematics (Su-Hak-Jeol-Yo), a mathematics book written by Jong-Hwa AN, by Sang-Gu Lee*, Jae Hwa Lee, Hyungwoo Byun>, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 25, No. 3, 641-352, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 25집 제 4호, 2011. 11. 641-352. (KCI-A)

120. Botany: A Modern Natural Science Book written by Mathematician Sang-Seol Lee (수학자 이상설이 소개한 근대자연과학: <植物學>), Young Min Park,  Chae Sik Kim, Sang-Gu Lee*, Jae Hwa Lee, J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 25, No. 2, 341-360, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 25집 제 2호, 2011. 5. 41-360. (KCI-A)

119. Excel Grapher: Dynamical Graphing Tool(Excel Grapher: 역동적 함수 그래프 도구), Kyung-Won Kim, Sang-Gu Lee* and Jae Hwa Lee, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 25집 제 2호, 2011. 5. 309-321,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 25, No. 2, May. 2011. 309-321(KCI-A))

118.  Y. Ham, Lee, Sang-Gu*, P. Vu; Characterization of the determinant of a Laguerre matrix,  Journal of Applied Mathematics and Computing, Volume 36, Issue 1-2 (2011), Page 233-239.  ISSN: 1598-5865, Springer (Scopus, KCI-A) The article is also available electronically on SpringerLink: http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s12190-010-0399-2.

117. A study on mathematics books of Joseon Dynasty (조선시대 산서(算書) 연구, - 규장각 소장 산서 연구의 분석을 중심으로), Sang-Gu Lee with Jae Hwa Lee*, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 25집 제 1호, 2011. 2. 1-19,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 25, No. 1, Feb. 2011. 1-19(KCI-A)

116. MR2609612 Reviewed Horoldagva, Batmend; Lee, Sang-Gu Comparing Zagreb indices for connected graphs. Discrete Appl. Math. 158 (2010), no. 10, 1073–1078. 05C90 (05C35)SCI  PDF Clipboard Journal Article

115. MR2588728 Reviewed Das, Kinkar Ch.; Lee, Sang-Gu; Cheon, Gi-Sang On the conjecture for certain Laplacian integral spectrum of graphs. J. Graph Theory 63 (2010), no. 2, 106–113. (Reviewer: Bhaba Kumar Sarma) 05C50 (15A18)  PDF Clipboard Journal Article SCI

114. MR2552596 Reviewed Cheon, Gi-Sang; Lee, Sang-Gu; Shapiro, Louis W. The Fine numbers refined. European J. Combin. 31(2010), no. 1, 120–128. (Reviewer: Martin Klazar) 05A15 (11B75) SCI  PDF Clipboard Journal Article

113. Mobile Sage-Math for Linear Algebra and its Application, Duk-Sun Kim, Sang-Gu Lee*, Greg Markowsky, Electronic Journal of Mathematics & Technology (eJMT)  https://php.radford.edu/~ejmt/ContentIndex.php V.4, No. 3, p.1-13, Oct 2010.  ISSN 1933-2823.

112. Mathematical Modelling of the H1N1 Influenza, 신종 인플루엔자의 수학적 모델링, Sang-Gu Lee with Rae Young Ko*, Jae Hwa Lee, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 24집 제 4호, 2010. 11. 877-889,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 24, No. 4, Nov.  2010. 877-889(KCI)

111. Sang-Gu Lee, Han-Guk Seol, 한국 최초의 수학 및 과학 저널-數理學雜誌, First Mathematical Science Journal of Korea in 1905, The Korean Journal for History of Mathematics, V.23, No. 2, p.1-22, June 2010. (KCI-A)

110. Fibonacci sequences and the winning conditions for the blackout game, Sang-Gu Lee with Duk-Sun Kim, Faqir M. Bhatti, International Journal of Contemporary Mathematical Sciences, Vol. 5, 2010, no. 30, 1471 - 1485 ISSN: 1312-7586

109.  19世紀 朝鮮의 數學 敎科書, Mathematics Textbooks in the 19th Century Chosun, Sang-Gu Lee with Sung Sa Hong, Young Hee Hong,  Chae Whan Oh, The Korean Journal for History of Mathematics, 2010. 2., v.23, n.1, pp.1-24. (KCI-A)

108. MR2562293 Reviewed Sakthivel, R.; Anandhi, E. R.; Lee, Sang-Gu Approximate controllability of impulsive differential inclusions with nonlocal conditions. Dynam. Systems Appl. 18 (2009), no. 3-4, 637–653. (Reviewer: Nazim I. Mahmudov)93B05 (34G25 34K35 34K45)  SCI, PDF Clipboard Journal Article

107. MR2547916 Reviewed Das, Kinkar Ch.; Lee, Sang-Gu On the Estrada index conjecture. Linear Algebra Appl. 431 (2009), no. 8, 1351–1359. (Reviewer: Zoran S. Radosavljevi?) 05C50 (05C05 05C90) SCI PDF Clipboard Journal Article

106. MR2541709 Reviewed Ham, Yoon Mee; Lee, Sang-Gu; Kim, Duk-Sun A modified family of Laguerre iteration functions of quartically convergence. Int. J. Pure Appl. Math. 54 (2009), no. 1, 19–26. (Reviewer: Gert Van den Eynde) 65H05 PDF Clipboard Journal Article

105. MR2523548 Reviewed Sakthivel, R.; Mahmudov, N. I.; Lee, Sang-Gu Controllability of non-linear impulsive stochastic systems. Internat. J. Control 82 (2009), no. 5, 801–807. (Reviewer: Zhichun Yang) 93B05 (49N25 93E03 93E20) PDF Clipboard Journal Article SCI

104. 李相卨의 算書 數理, Lee Sang Seol's mathematics book <Su Ri>, Sang-Gu Lee with Sung Sa Hong and Young Hee Hong , The Korean Journal for History of Mathematics, 2009. 11., v.22, n.4, pp.1-14. (KCI-A)

103. Educational policy and curriculums of Korean school mathematics in the late 19th and early 20th century, Sang-Gu Lee with  Jihwa Noh and Sung-Yell Song, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 23권 제4호. 2009. 11. 1093-1130,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 23 No 4, Nov. 2009. 1093-1130 (KCI)

102. 모바일 환경에서의 Sage-Math의 개발과 선형대수학에서의 활용, Development of Mobile Sage-math and its use in Linear Algebra, Sang-Gu Lee with  Rae-Young Ko, Duk-Sun Kim and Jin-Yeong Bak, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 23집 제 4호, 2009. 11. 483-506,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 23, No. 4, Nov.  2009. 483-506 (KCI)

101. Sang-Seol LEE: Father of Modern Mathematical Education in Korea, Sang-Gu Lee with Han-Guk Seol, The Korean Journal for History of Mathematics, 2009, v.22, n.3, pp.79-102. (KCI-A)

100. Comparison of early tertiary mathematics in USA and Korea, Sang-Gu Lee with  Han-Guk Seol and YoonMee Ham, 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 23집 제 4호, 2009. 11. 523-535,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 23 No 4, Nov. 2009. 523-535 (KCI)

99. Korean tertiary mathematics and curriculum in early 20th century, Sang-Gu Lee with Y. Ham,  The Korean Journal for History of Mathematics, 2009, v.22, n.3, pp.207-254. (KCI-A)

98. Ham, Yoon Mee; Lee, Sang-Gu; Kim, Duk-Sun A modified family of Laguerre iteration functions of quartically convergence. Int. J. Pure Appl. Math. 54 (2009), no. 1, 19--26. 65H05 PDF Doc Del Clipboard

97. Contribution of Oswald Veblen to AMS and its meaning in Korea, Sang-Gu Lee with with Y. Ham, The Korean Journal for History of Mathematics, 2009, v.22, n.2, pp.27-52. (KCI-A)

96.  History of mathematical modeling on the Blackout game, Sang-Gu Lee with D.-S Kim, C.-W. Ryu, Y.-M. Song, The Korean Journal for History of Mathematics, 2009, v.22, n.1, pp.53-74. (KCI-A)

95. MathML and JAVA Implementation in Linear Algebra, Sang-Gu Lee with with Duk-Sun Kim, The Electronic Journal of Mathematics and Technology, Volume 3, Number 1, 1-11, ISSN 1933-2823, (2009)

94. MR2474641 Reviewed Ham, YoonMee; Chun, Changbum; Lee, Sang-Gu Some higher-order modifications of Newton's method for solving nonlinear equations. J. Comput. Appl. Math. 222 (2008), no. 2, 477–486. (Reviewer: Gerd Pönisch)65H05 PDF Clipboard Journal Article SCI

93. MR2435466 Reviewed Lee, Sang-Gu; Ham, YoonMee A Hopf bifurcation in a radially symmetric free boundary problem. Dyn. Partial Differ. Equ. 5 (2008), no. 2, 173–183. (Reviewer: Christos V. Nikolopoulos) 35R35 (35B10 35B32 35K57 37L10) Editor: Y. Charles Li, S.-T. Yau (Harvard) PDF Clipboard Journal Article SCIE

92. MR2414001 Reviewed Lee, Sang-Gu; Seol, Han-Guk; Yang, Jeong-Mo Bound for 2-exponents of primitive extremal tournaments. Ars Combin. 87 (2008), 3–12. 05C20, PDF Clipboard Journal Article

91.  Applications on the image processing using singular value preservers, Sang-Gu Lee with with Duk-Sun Kim, Image and Signal Processing, 2008. CISP '08. Congress, (ISSN 978-0-7695-3119-9 )  537 - 541 .

90. A GENERATION OF A DETERMINANTAL FAMILY OF ITERATION FUNCTIONS AND ITS CHARACTERIZATION,  (with YOONMEE HAM and JERRY RIDENHOUR), Korean J. Math. 16 (2008), No. 4, pp. 481-494. KCI

89. The educational models using enhanced mathematics ICT in the Korean IT environments, 21세기 선진형 ICT 수학 교육 방법론 모델, (with Jin-Yeong Bak and Duk-Sun Kim) 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 22집 제4호. 2008. 11. 533-543 ,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 22 No 4, Nov. 2008. 533-543, (KCI)

88. The Analytic Hierarchy Process and related Matrix Theory , (with Jeong-Mo Yang) 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 22집 제4호. 2008. 11. 459-469 ,  J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education,  Vol. 22 No 4, Nov. 2008. 459-469, (KCI)

87. Repulsive fixed-points of the Laguerre-like iteration functions, (with YoonMee Ham), Korean Journal of Mathematics, 16 (2008), No. 1, pp. 51-55, April 2008 (KCI)86.  R. L. Moore's Moore Method and its meaning in Korea, The Korean Journal for History of Mathematics, 2008, v.21, n.1, pp.77-88, (with Sangwook Ree and Duk-Sun Kim) (KCI-A)

85. 선형대수학 교육에 적용되는 양방향 콘텐츠 기반의 MathML 과 JAVA 도구에 관한 연구, J. Korea Soc. Math. Ed. Ser. A: The Mathematical Education,  Vol. 47 No 1, Feb. 2008. 76-90 (with Duk-Sun Kim and Kyung-Hoon Jung, 설한국) (KCI-A)

84. MR2365067 Reviewed Cheon, Gi-Sang; Hwang, Suk-Geun; Lee, Sang-Gu Several polynomials associated with the harmonic numbers. Discrete Appl. Math. 155 (2007), no. 18, 2573–2584. (Reviewer: Volker Strehl) 11B68 (05A19 11B73) PDF Clipboard Journal Article SCI

83. MR2281869 Reviewed Beasley, Leroy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Frobenius and Dieudonné theorems over semirings. Linear Multilinear Algebra 55 (2007), no. 1, 19–34. (Reviewer: Natalia Bebiano) 15A15 PDF Clipboard Journal Article SCI

82.  Ground of the revolutionary change in early 20C American Mathematics, The Korean Journal for History of Mathematics, v.20, n.3, pp.127-146  (with S.-G. Hwang, G.-S. Cheon) (2007) (KCI-A)

81. LINEAR OPERATORS PRESERVING MAXIMAL COLUMN RANKS OF NONNEGATIVE REAL MATRICES,  by KYUNG-TAE KANG, DUK-SUN KIM, SANG-GU LEE¤, and HAN-GUK SEOL, Kangweon-Kyungki Math. Jour. 15 (2007), No. 2, pp. 101-114

80. 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 21집 제4호. 2007. 11. 621-646 ,   J. Korea Soc. Math. Ed. Ser. E: Communications of Mathematical Education, Vol. 21 No 4, Nov. 2007. 621-646, 시각화를 이용한 선형대수학 교수학습모델 - R^n 의 부분공간,  김 덕 선 (성균관대학교) 이 상 구 (성균관대학교)* 정 경 훈 (성균관대학교)  http://km.naver.com/list/view_detail.php?dir_id=70301&docid=34314443

79. 韓國數學敎育學會誌 시리즈 E  <數學敎育 論文集>  제 21집 제4호. 2007. 11. 597-612,   J. Korea Soc. Math. Ed. Ser. E:  Communications of Mathematical Education, Vol. 21 No 4, Nov. 2007. 597-612, m by n  크기의 일반적인 흑백 게임의최적해와 타일링, 김덕선(성균관대) 이상구(성균관대) * http://km.naver.com/list/view_detail.php?dir_id=70301&docid=34314116

78. MR2218803 Reviewed Lee, Sang-Gu; Yang, Jeong-Mo Linear algebraic approach on real σ-game. J. Appl. Math. Comput. 21(2006), no. 1-2, 295–305. 91A46 (68Q45) SCI PDF Clipboard Journal Article

[77]MR2190705 Lee, Sang-Gu; Seol, Han-Guk Graph representations of normal matrices. J. Korean Math. Soc. 43 (2006), no. 1, 215--224. 05C50 (15A57), Review in linked PDF Add citation to clipboard Document Delivery Service (SCIE)


[76]  MR2167076 Lee, Sang Gu; Yang, Jeong Mo Bound for 2-exponents of primitive extremal ministrong digraphs. Commun. Korean Math. Soc. 20 (2005), no. 1, 51--62. 05Cxx Review in linked PDF Add citation to clipboard Document Delivery Service KCI-A


[75] MR2161933 (2006d:15049) Hwang, Suk-Geun; Kim, Ik-Pyo; Kim, Si-Ju; Lee, Sang-Gu The number of zeros of a tight sign-central matrix. Linear Algebra Appl. 407 (2005), 296--310. 15A99

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  (SCI)


[74]  MR2138757 Kim, Ik-Pyo; Lee, Sang-Gu; Seol, Han-Guk Matrices with prescribed permanent using binary number system of integers. Int. J. Pure Appl. Math. 19 (2005), no. 3, 415--420. 15A15 (15A36)

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[73] MR2134969 Beasley, LeRoy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Linear preservers of zeros of matrix polynomials. Linear Algebra Appl. 401 (2005), 325--340. 15A04
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  (SCI)



[72] MR2098603 (2005h:15006) Beasley, LeRoy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Linear transformations preserving the Grassmannian over $\scr M\sb n(\bold Z\sb +)$. Linear Algebra Appl. 393 (2004), 39--46. 15A04
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  (SCI)



[71] MR2028036 (2004m:35121) Ham, YoonMee; Lee, Sang-Gu Effects on global coupling of an interface problem in an activator-inhibitor system. J. Comput. Appl. Math. 162 (2004), no. 2, 393--409. (Reviewer: L. Hsiao) 35K45 (35B10 35B25 35K57 37L10)
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    (SCI)



[70] MR2024831 (2004j:91071) Jin, Ming-Ai; Lee, Sang-Gu; Neal, Cora; Ree, Sangwook A matrix method for the input-output analysis of economic systems. Int. Math. J. 4 (2003), no. 6, 515--525. 91B02 (15A48)
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[69] MR1980657 (2004d:15035) Beasley, LeRoy B.; Lee, Sang-Gu; Seol, Han-Guk Inverse principally centrogonal matrices. Int. J. Pure Appl. Math. 5 (2003), no. 3, 315--321. 15A57
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[68] MR1976930 (2004b:15004) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho A characterization of strong preservers of matrix majorization. Linear Algebra Appl. 367 (2003), 341--346. (Reviewer: Peter \v Semrl) 15A04 (15A21)
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    (SCI)



[67] MR1913345 (2003k:11024) Lee, Gwang-Yeon; Kim, Jin-Soo; Lee, Sang-Gu Factorizations and eigenvalues of Fibonacci and symmetric Fibonacci matrices. A special tribute to Calvin T. Long. Fibonacci Quart. 40 (2002), no. 3, 203--211. (Reviewer: Shiro Ando) 11B39 (15A23 15A36 15A42)
Review in linked PDF Add citation to clipboard Document Delivery Service Journal Original Article



    (SCIE)



[66] MR1906757 (2003g:15004) Beasley, LeRoy B.; Lee, Sang-Gu; Song, Seok-Zun Linear operators that preserve pairs of matrices which satisfy extreme rank properties. Linear Algebra Appl. 350 (2002), 263--272. (Reviewer: Alexander E. Guterman) 15A04 (15A03 15A15 47B49)
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  (SCI)



[65] MR1903621 (2003d:15002) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho Resolution of the conjecture on strong preservers of multivariate majorization. Bull. Korean Math. Soc. 39 (2002), no. 2, 283--287. (Reviewer: Chong Guang Cao) 15A04
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    (KCI-A)



[64] MR1928400 (2003m:15005) Beasley, Leroy B.; Song, Seok-Zun; Lee, Sang-Gu Zero-term rank preservers. Linear preserver problems (Lisbon, 1999). Linear and Multilinear Algebra 48 (2001), no. 4, 313--318. (Reviewer: Richard D. Hill) 15A04 (15A33)
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    (SCIE)



[63] MR1829526 (2002b:11027) Lee, Gwang-Yeon; Lee, Sang-Gu; Kim, Jin-Soo; Shin, Hang-Kyun The Binet formula and representations of $k$-generalized Fibonacci numbers. Fibonacci Quart. 39 (2001), no. 2, 158--164. (Reviewer: Shiro Ando) 11B39 (15A15)
Review in linked PDF Add citation to clipboard Document Delivery Service Journal Original Article



    (SCIE)



[62] MR1825067 (2001m:11019) Lee, Gwang-Yeon; Kim, Jin-Soo; Lee, Sang-Gu A representation and some properties for $k$-Fibonacci sequences. Missouri J. Math. Sci. 13 (2001), no. 2, 92--102. (Reviewer: Curtis N. Cooper) 11B39
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[61] MR1817961 (2001m:15044) Park, S.-W.; Beasley, L. B.; Lee, S.-G. Idempotence of $(1,-1)$-matrices. Proceedings of the Thirty-first Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, FL, 2000). Congr. Numer. 146 (2000), 17--28. 15A36
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[60] MR1757591 (2001d:15010) Kim, Jin-Soo; Lee, Sang-Gu; Lee, Gwang-Yeon; Song, Seok-Zun On the spectral norm and eigenvalues of $W\sb c$-companion matrices. Int. J. Appl. Math. 2 (2000), no. 9, 1061--1072. (Reviewer: Chi-Kwong Li) 15A18
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[59] MR1734203 (2000i:15005) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators preserving multivariate majorization. Linear Algebra Appl. 304 (2000), no. 1-3, 141--159. (Reviewer: Peter \v Semrl) 15A04 (15A21 15A30)
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    (SCI)



[58] MR1757158 (2001c:15004) Beasley, LeRoy B.; Song, Seok-Zun; Lee, Sang-Gu Linear operators that preserve zero-term rank of Boolean matrices. J. Korean Math. Soc. 36 (1999), no. 6, 1181--1190. (Reviewer: Peter \v Semrl) 15A04 (15A03 15A33)
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    (SCIE)



[57] MR1734314 (2000j:35278) Ham, YoonMee; Lee, Sang-Gu A Hopf bifurcation of interfaces in a Dirichlet problem. Southwest J. Pure Appl. Math. 1999, no. 2, 47--60 (electronic). (Reviewer: Vladimir Grebenev) 35R35 (34C23 35B32 37G15 37L10)
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[56] MR1698689 (2000f:15002) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho Linear operators strongly preserving multivariate majorization with $T(I)=I$. Kyungpook Math. J. 39 (1999), no. 1, 191--194. (Reviewer: Chi-Kwong Li) 15A04 (15A21 15A30)
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[55] MR1659324 (99h:15023) Cheon, G.-S.; Johnson, C. R.; Lee, S.-G.; Pribble, E. J. The possible numbers of zeros in an orthogonal matrix. Electron. J. Linear Algebra 5 (1999), 19--23 (electronic). 15A57
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    (SCIE)



[54] MR1732696 (2000k:15046) Park, S.-W.; Seol, H.-G.; Lee, S.-G. A characterization of minimal semipositivity of sign pattern matrices. Commun. Korean Math. Soc. 13 (1998), no. 3, 465--473. 15A48
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[53] MR1483520 (98i:15006) Lee, Sang-Gu; Park, Se-Won; Seol, Han-Guk Linear operators strongly preserving matrices whose sign patterns require the Perron property. Linear Algebra Appl. 269 (1998), 53--63. (Reviewer: N. J. Pullman) 15A04
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[52] MR1443283 (98a:15004) Lee, G.-Y.; Lee, S.-G.; Song, S.-Z. Linear operators that strongly preserves [preserve] the sign-central matrices. Bull. Korean Math. Soc. 34 (1997), no. 1, 51--61. (Reviewer: Walter S. Sizer) 15A04 (15A48)
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[51] MR1421266 (97g:15026) Lee, G.-Y.; Lee, S.-G.; Shin, H.-G. On the $k$-generalized Fibonacci matrix $Q\sb k$. Linear Algebra Appl. 251 (1997), 73--88. (Reviewer: J. L. Brenner) 15A57 (60C05)
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[50] MR1419750 (97h:15001) Beasley, LeRoy B.; Lee, Gwang-Yeon; Lee, Sang-Gu Linear transformations that preserve the assignment. II. J. Korean Math. Soc. 33 (1996), no. 3, 527--539. (Reviewer: D. J. Hartfiel) 15A04 (15A15)
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[49] MR1430413 (98c:15051) Lee, Sang-Gu; Park, Se-Won The allowance of idempotent of sign pattern matrices. Commun. Korean Math. Soc. 10 (1995), no. 3, 561--573. (Reviewer: Jaroslav Zemánek) 15A30 
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[48] MR1355672 (96k:15001) Song, Seok-Zun; Lee, Sang-Gu Column ranks and their preservers of general Boolean matrices. J. Korean Math. Soc. 32 (1995), no. 3, 531--540. (Reviewer: N. J. Pullman) 15A03 (15A33)
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[47] MR1337800 (96f:11025) Lee, Gwang-Yeon; Lee, Sang-Gu A note on generalized Fibonacci numbers. Fibonacci Quart. 33 (1995), no. 3, 273--278. (Reviewer: Shiro Ando) 11B39 (15A15 15A36)
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[46] MR1306988 (95i:15007) Beasley, LeRoy B.; Lee, Gwang-Yeon; Lee, Sang-Gu Linear transformations that preserve the assignment. Proceedings of the 3rd ILAS Conference (Pensacola, FL, 1993). Linear Algebra Appl. 212/213 (1994), 387--395. (Reviewer: D. J. Hartfiel) 15A15
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[45] MR1297422 (96a:05029) Beasley, LeRoy B.; Lee, Sang-Gu Linear $p(X)=X$ preservers over general Boolean semirings. J. Korean Math. Soc. 31 (1994), no. 3, 353--365. (Reviewer: S. Lajos) 05B20 (15A24 15A33)
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[44] MR1308697 (96a:16051) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators strongly preserving $r$-cyclic matrices over semirings. Linear and Multilinear Algebra 35 (1993), no. 3-4, 325--337. (Reviewer: Chong Guang Cao) 16Y60 (15A33)
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[43] MR1148418 (93a:15029) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators strongly preserving $r$-potent matrices over semirings. Directions in matrix theory (Auburn, AL, 1990). Linear Algebra Appl. 162/164 (1992), 589--599. (Reviewer: Walter S. Sizer) 15A99 (16Y60)
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[42] MR1703450 Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho Linear operators strongly preserving multivariate majorization. Proceedings of the Prague Mathematical Conference 1996, 19--22, Icaris, Prague, 199?. 15A04 (15A21)
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Scholarly Papers

         41. 수리과학 디지털 도서관: Math Science Digital Library,  Journal of Korean Soc. Math. Ed. Ser. E: Comm. of Mathematical Education, Nov. 2006, Vol. 20, No. 4, 537-549

CitationsPublication
19MR1913345 (2003k:11024) Lee, Gwang-Yeon; Kim, Jin-Soo; Lee, Sang-Gu Factorizations and eigenvalues of Fibonacci and symmetric Fibonacci matrices. A special tribute to Calvin T. Long. Fibonacci Quart. 40 (2002), no. 3, 203–211. (Reviewer: Shiro Ando) 11B39 (15A23 15A36 15A42)
17MR1906757 (2003g:15004) Beasley, LeRoy B.; Lee, Sang-Gu; Song, Seok-Zun Linear operators that preserve pairs of matrices which satisfy extreme rank properties. Linear Algebra Appl. 350 (2002),263–272. (Reviewer: Alexander E. Guterman) 15A04 (15A03 15A15 47B49)
15MR2547916 (2010j:05230) Das, Kinkar Ch.; Lee, Sang-Gu On the Estrada index conjecture. Linear Algebra Appl. 431 (2009), no. 8, 1351–1359. (Reviewer: Zoran S. Radosavljevi?) 05C50 (05C05 05C90)
12MR1337800 (96f:11025) Lee, Gwang-Yeon; Lee, Sang-Gu A note on generalized Fibonacci numbers. Fibonacci Quart. 33 (1995), no. 3, 273–278. (Reviewer: Shiro Ando) 11B39 (15A15 15A36)
12MR2523548 (2010b:93023) Sakthivel, R.; Mahmudov, N. I.; Lee, Sang-Gu Controllability of non-linear impulsive stochastic systems. Internat. J. Control 82 (2009), no. 5, 801–807. (Reviewer: Zhichun Yang) 93B05 (49N25 93E03 93E20)
11MR1829526 (2002b:11027) Lee, Gwang-Yeon; Lee, Sang-Gu; Kim, Jin-Soo; Shin, Hang-Kyun The Binet formula and representations of k-generalized Fibonacci numbers. Fibonacci Quart. 39 (2001), no. 2, 158–164. (Reviewer: Shiro Ando) 11B39 (15A15)
10MR1421266 (97g:15026) Lee, G.-Y.; Lee, S.-G.; Shin, H.-G. On the k-generalized Fibonacci matrix Qk. Linear Algebra Appl. 251 (1997), 73–88. (Reviewer: J. L. Brenner) 15A57 (60C05)
9MR1659324 (99h:15023) Cheon, G.-S.; Johnson, C. R.; Lee, S.-G.; Pribble, E. J. The possible numbers of zeros in an orthogonal matrix. Electron. J. Linear Algebra 5 (1999), 19–23 (electronic).15A57
8MR1734203 (2000i:15005) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators preserving multivariate majorization. Linear Algebra Appl. 304 (2000), no. 1-3, 141–159. (Reviewer: Peter Šemrl)15A04 (15A21 15A30)
7MR1698689 (2000f:15002) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho Linear operators strongly preserving multivariate majorization with T(I)=I. Kyungpook Math. J. 39 (1999), no. 1, 191–194. (Reviewer: Chi-Kwong Li) 15A04 (15A21 15A30)
7MR2365067 (2008m:11036) Cheon, Gi-Sang; Hwang, Suk-Geun; Lee, Sang-Gu Several polynomials associated with the harmonic numbers. Discrete Appl. Math. 155 (2007), no. 18, 2573–2584. (Reviewer: Volker Strehl) 11B68 (05A19 11B73)
6MR2954494 Lee, Sang-Gu; Vu, Quoc-Phong Simultaneous solutions of matrix equations and simultaneous equivalence of matrices. Linear Algebra Appl. 437 (2012), no. 9, 2325–2339. 15A24 (15A21 47A13)
6MR1148418 (93a:15029) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators strongly preserving r-potent matrices over semirings. Directions in matrix theory (Auburn, AL, 1990). Linear Algebra Appl.162/164 (1992), 589–599. (Reviewer: Walter S. Sizer) 15A99 (16Y60)
6MR2588728 (2011c:05190) Das, Kinkar Ch.; Lee, Sang-Gu; Cheon, Gi-Sang On the conjecture for certain Laplacian integral spectrum of graphs. J. Graph Theory 63 (2010), no. 2, 106–113. (Reviewer: Bhaba Kumar Sarma) 05C50 (15A18)
6MR1976930 (2004b:15004) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho A characterization of strong preservers of matrix majorization. Linear Algebra Appl. 367 (2003), 341–346. (Reviewer: Peter Šemrl) 15A04 (15A21)
5MR2474641 (2010a:65075) Ham, YoonMee; Chun, Changbum; Lee, Sang-Gu Some higher-order modifications of Newton's method for solving nonlinear equations. J. Comput. Appl. Math. 222 (2008),no. 2, 477–486. (Reviewer: Gerd Pönisch) 65H05
5MR1928400 (2003m:15005) Beasley, Leroy B.; Song, Seok-Zun; Lee, Sang-Gu Zero-term rank preservers. Linear preserver problems (Lisbon, 1999). Linear and Multilinear Algebra 48 (2001), no. 4,313–318. (Reviewer: Richard D. Hill) 15A04 (15A33)
4MR1757158 (2001c:15004) Beasley, LeRoy B.; Song, Seok-Zun; Lee, Sang-Gu Linear operators that preserve zero-term rank of Boolean matrices. J. Korean Math. Soc. 36 (1999), no. 6, 1181–1190. (Reviewer: Peter Šemrl) 15A04 (15A03 15A33)
3MR1903621 (2003d:15002) Beasley, LeRoy B.; Lee, Sang-Gu; Lee, You-Ho Resolution of the conjecture on strong preservers of multivariate majorization. Bull. Korean Math. Soc. 39 (2002), no. 2,283–287. (Reviewer: Chong Guang Cao) 15A04
3MR1355672 (96k:15001) Song, Seok-Zun; Lee, Sang-Gu Column ranks and their preservers of general Boolean matrices. J. Korean Math. Soc. 32 (1995), no. 3, 531–540. (Reviewer: N. J. Pullman)15A03 (15A33)
2MR2134969 (2006b:15003) Beasley, LeRoy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Linear preservers of zeros of matrix polynomials. Linear Algebra Appl. 401 (2005), 325–340.15A04 (15A30)
2MR2281869 (2008a:15014) Beasley, Leroy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Frobenius and Dieudonné theorems over semirings. Linear Multilinear Algebra 55 (2007), no. 1, 19–34. (Reviewer: Natalia Bebiano) 15A15
2MR2098603 (2005h:15006) Beasley, LeRoy B.; Guterman, Alexander E.; Lee, Sang-Gu; Song, Seok-Zun Linear transformations preserving the Grassmannian over ?n(Z+). Linear Algebra Appl. 393(2004), 39–46. 15A04
2MR2218803 (2006k:91056) Lee, Sang-Gu; Yang, Jeong-Mo Linear algebraic approach on real  σ -game. J. Appl. Math. Comput. 21 (2006), no. 1-2, 295–305. 91A46 (68Q45)
2MR2810554 (2012k:15022) Lee, Sang-Gu; Vu, Quoc-Phong Simultaneous solutions of Sylvester equations and idempotent matrices separating the joint spectrum. Linear Algebra Appl. 435 (2011), no. 9, 2097–2109. 15A24 (15A27 47A13 47A62)
2MR2562293 (2011b:93020) Sakthivel, R.; Anandhi, E. R.; Lee, Sang-Gu Approximate controllability of impulsive differential inclusions with nonlocal conditions. Dynam. Systems Appl. 18(2009), no. 3-4, 637–653. (Reviewer: Nazim I. Mahmudov) 93B05 (34G25 34K35 34K45)
2MR2609612 (2011b:05271) Horoldagva, Batmend; Lee, Sang-Gu Comparing Zagreb indices for connected graphs. Discrete Appl. Math. 158 (2010), no. 10, 1073–1078. 05C90 (05C35)
1MR2435466 (2009d:35354) Lee, Sang-Gu; Ham, YoonMee A Hopf bifurcation in a radially symmetric free boundary problem. Dyn. Partial Differ. Equ. 5 (2008), no. 2, 173–183. (Reviewer: Christos V. Nikolopoulos) 35R35 (35B10 35B32 35K57 37L10)
1MR1430413 (98c:15051) Lee, Sang-Gu; Park, Se-Won The allowance of idempotent of sign pattern matrices. Commun. Korean Math. Soc. 10 (1995), no. 3, 561–573. (Reviewer: Jaroslav Zemánek) 15A30
1MR2829393 (2012e:05224) Das, Kinkar Ch.; Bhatti, Faqir M.; Lee, Sang-Gu; Gutman, IvanSpectral properties of the He matrix of hexagonal systems. MATCH Commun. Math. Comput. Chem. 65(2011), no. 3, 753–774. (Reviewer: Rong Si Chen) 05C50 (05C90)
1MR2167076 (2006i:05073) Lee, Sang Gu; Yang, Jeong Mo Bound for 2-exponents of primitive extremal ministrong digraphs. Commun. Korean Math. Soc. 20 (2005), no. 1, 51–62. (Reviewer: Guantao Chen) 05C20 (05C50)
1MR2161933 (2006d:15049) Hwang, Suk-Geun; Kim, Ik-Pyo; Kim, Si-Ju; Lee, Sang-Gu The number of zeros of a tight sign-central matrix. Linear Algebra Appl. 407 (2005), 296–310. 15A99
1MR1308697 (96a:16051) Beasley, LeRoy B.; Lee, Sang-Gu Linear operators strongly preserving  r-cyclic matrices over semirings. Linear and Multilinear Algebra 35 (1993), no. 3-4, 325–337. (Reviewer: Chong Guang Cao) 16Y60 (15A33)
1MR2552596 (2010j:05022) Cheon, Gi-Sang; Lee, Sang-Gu; Shapiro, Louis W. The Fine numbers refined. European J. Combin. 31 (2010), no. 1, 120–128. (Reviewer: Martin Klazar) 05A15 (11B75)
1MR1443283 (98a:15004) Lee, G.-Y.; Lee, S.-G.; Song, S.-Z. Linear operators that strongly preserves [preserve] the sign-central matrices. Bull. Korean Math. Soc. 34 (1997), no. 1, 51–61. (Reviewer: Walter S. Sizer) 15A04 (15A48)
 Conferences Attended at which a paper was presented since 1990.: (학술대회발표)