Revised on  May 8,  2002

This query took 0.060 seconds

57.  "Resolution of a conjecture on strong preservers of Multivariate Majorization", (with LeRoy B. Beasley and You-Ho Lee), To appear in Bull. Korean Math. Soc. (2002)

55. "Factorizations and eigenvalues of Fibonacci and symmetric Fibonacci matrices, (with Jin-Soo Kim, Gwang-Yeon Lee), To appear in Fibonacci Quart. (2002)

 65. " Linear operators that preserve pair of matrices which satisfy extreme rank properties" (with LeRoy B. Beasley and Seok-Zun Song), To appear in Linear Algebra Appl., 350, 263-272  (2002).

63. "Zero-Term Rank Preservers" (with Seok-Zun Song and LeRoy B. Beasley), Linear and Multilinear Algebra,  Vol. 48, No.4, 313-318 (2001).

56.  "A Representation and Some Properties for k-Fibonacci Sequences" (with Jin-Soo Kim, Gwang-Yeon Lee), Missori Jour. of Math. Science, 13, 2, 92-102 (2001).

54. "The Binet Formula and Representations of $k$-generalized Fibonacci Numbers" (with G.-Y. Lee, J.-S. Kim, H.-K. Shin), Fibonacci Quarterly  39, 2, 158-164 (2001) .

64. "Idempotence of (1,-1)-Matrices", (with S.-W. Park and LeRoy B. Beasley), Congressus Numerantium, 146, 1, 17-28 (2000),

51. "Nonnegavity of reducible sign idempotent matrices" (with S.-W. Park and Seok-Zun Song), Korean Jour. of Comp. and Appl. Math  Vol. 7, No. 2, May, pp.665-671, (2000)

50.  "The existence theorem of orthogonal  matrices with p nonzero entries ",  Jour of KSIAM. Vol. 4, No. 1, 109-119 (2000)

---

[1] 1 757 591 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. 15A18
Review in linked PDF | Add citation to clipboard | 

---

[2] 1 757 158 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. 15A03 (15A04)
Review in linked PDF | Add citation to clipboard | 

---

[3] 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
Review in linked PDF | Add citation to clipboard | 

---

[4] 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)
Review in linked PDF | Add citation to clipboard | 

---

[5] 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)
Review in linked PDF | Add citation to clipboard | 

---

[6] 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)
Review in linked PDF | Add citation to clipboard | 

---

[7] 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
Review in linked PDF | Add citation to clipboard | 

---

[8] 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
Review in linked PDF | Add citation to clipboard | 

---

[9] 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
Review in linked PDF | Add citation to clipboard | 

---

[10] 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)
Review in linked PDF | Add citation to clipboard | 

---

[11] 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)
Review in linked PDF | Add citation to clipboard | 

---

[12] 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)
Review in linked PDF | Add citation to clipboard | 

---

[13] 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)
Review in linked PDF | Add citation to clipboard | 

---

[14] 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)
Review in linked PDF | Add citation to clipboard | 

---

[15] 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)
Review in linked PDF | Add citation to clipboard | 

---

[16] 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)
Review in linked PDF | Add citation to clipboard | 

---

[17] 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
Review in linked PDF | Add citation to clipboard | 

---

[18] 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)
Review in linked PDF | Add citation to clipboard | 

---

[19] 1 703 450 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)
Review in linked PDF | Add citation to clipboard | 

---

Copyright American Mathematical Society 2001  

 (Preprints)

68. A Matrix Method in Input-Output Analysis Of Economic Systems, (with Ming-Ai Jin and Sang-Wookn Ree), Preprint (2002)

66.  "Normal matrices and related bipartite graphs" (with G.-S. Cheon and  H.-G. Seol), Preprint, 2002

67. "Centrogonal  Matrices" (with  H.-G. Seol and L. Beasley), Preprint (2002)

58. Submitted to Commun. Korean Math. Soc.  # 00-**,  "A Characterization of Strong Preservers of Matrix Majorization "(2001)

45. "Sign Idempotent matrices" (with L. Beasley), Preprint.
46.  "Linear Algebra and our softwares" (with G.S.Cheon), ¡¡ In preparation.
37. "Complex positive definite completion" (with H.G. Seol) In Prep.
35. " A characterization of sign idempotent matrices with full sign pattern " (with L. Beasley and S.W. Park),
34. "Matrix Theory: It's Old days and Present," (with O.K.Kang), In prep.

(Scholarly Papers)" 

59."A survey on the matrix completion problem", (with Han-Guk Seol), Trends in Math., ICMS, Vol. 4, No. 1, June 2001 pp. 38~43

60. "Weights of Idempotent Matrices", (with L. B. Beasley and Se-Won Park), Trends in Math., ICMS,4, 1, 95-100 June (2001)

62. "7Â÷ ±³À°°úÁ¤ÀÇ ¼öÇп¡¼­ °øÇÐÀû µµ±¸ÀÇ ÀÌ¿ë¿¡ °üÇÏ¿©" , J. Korean Soc. Math. Ed. Ser. E; Communications of Mathematical Education, Vol. 11, Jan. (2001), 355-365.

61. "A survey on Majorizations and its preservers ", (with You- Ho Lee), Trends in Math., ICMS, Vol. 3, Dec. (2000), 60-68.

53. "Linear Algebra with Advanced Technique", (with Eun-Tae Kim and Kyung-Hun Chung), J. Bas. Sci., Sungkyunkwan Univ. Vol. 50, (1999), pp.23-51.

52. "A construction of (0,1)-matrices with prescribed permanent using binary number system of integers (with Han-Guk Seol), J. Bas. Sci., Sungkyunkwan Univ. Vol. 50, pp.17-22., (1999)

45. "Sign Nonsingularity and it's related algorithm for the determination of L-matrix" (with H.G. Seol and Y.H. Kim), J. of Nat. Sci. SKKU. Vol. 48, 15-29, (1997)

33. On a sign pattern and it's related algorithm for L-matrix " (with H.G. Seol and Y.H. Kim), J. KSIAM. Vol.3, No.1, 43-53, 1999.
32. "On an algorithm for the determination of L-matrix" (with H.G. Seol)¡¡ Proc. Workshops in Pure Math. V. 16, part I (1997) pp.165-178.
31. "Sign Nonsingularity and it's related algorithm for the determination of L-matrix" (with H.G. Seol and Y.H. Kim), J. of Nat. Sci. SKKU. Vol. 48, 15-29, (1997)
30. "Linear Operators Strongly Preserving Multivariate Majorization " (with Y.H. Lee) Proc. Workshops in Pure Math. V. 17, part I (1997) pp.113-118.
29. "Sign patterns with minimal semipositivity and inverse nonnegativity" (with H.K. Seol and S.W. Park),¡¡ Proc. Workshops in Pure Math. V. 17, part I (1997) pp.155-164.
28. "Differential Operators that Preserve Differential Equations" (with S.Z.Song),¡¡ J. of Nat. Sci. SungKyunKwan Univ. V.47 No.2 pp. 1-9 (1996)
26. "A Characterization of Strong Preservers on Multivariate Majorization", Proc. of InHa Symposium on Pure and appl. Math.,June , pp.17-30 ¡¡(1997)
21. "Linear operators strongly preserving multivariate majorization"(with Y.H. Lee), J. of Nat. Sci. SungKyunKwan Univ. V.47 No.1 pp. 1-9 (1995)
20. "Linear Operators strongly preserving matrices whose sign-pattern require the Perron property" (with S.W. Park and H.G. Seol), Proc. Workshops in Pure Math. V. 16, part I , pp.213-220 (1996)
18. "For the positive definite sign pattern matrices" (with S.W. Park) J. of Nat. Sci. SungKyunKwan Univ. V.45 No.2 pp.63-68 (1994)
17. "For inverse sign-pattern matrices" (with S.W. Park, G.H. Kim) J. of Nat. Sci. SungKyunKwan Univ. V.46 No.1 pp.57-62 (1995)
13. "Evaluation on the structure of expressways of Korea using transportation matrix" (with G.Y. Lee) J. of Nat. Sci.¡¡¡¡¡¡¡¡ SungKyunKwan Univ. V.45 No.1, 33-43. (1994)
10. "Linear Transformations that preserve the Assignment on nonnegative reals" (with G.Y. Lee), Proc. Workshops in Pure Math V. 13, part I , pp.137-146 (1993)
9. "Sensitivity analysis on Linear Programming algorithm", J. Nat. Sci. SungKyunKwan Univ. V.44, No.2, 47-55. (1993)
8. "A Linearization of a Free Boundary problem with the generalized Mckean kinetics" (with Y.M.Ham), J. of Nat. Sci. SungKyunKwan Univ. V.44 No. 2, 17-24.(1993)
7. "On a Question of Kostin" (with S.W.Park), J. of Nat. Sci. SungKyunKwan Univ. V.44 No.1, 71-74. (1993)
6. "Equivalent Factors in Gaussian Elimination and Conjugate direction Method" (with Y.H. Lee and Y.M. Ham), J. of Nat. Sci. SungKyunKwan Univ. V.44 No.1, 61-69.(1993)
4. "A Proof on a Simpler Construction of the Jordan Canonical Form", J. Nat. Sci. Sung Kyun Kwan Univ. V.43, No 1, 43-46. (1992)
2. "Linear operators strongly preserving polynomial equations over antinegative semirings ", Ph.D. Dissertation, Utah State University, 1991
1. "On the generalization of the Gershgorin theorem", M.S. thesis, Utah State University, 1987

¡¡ ¡¡
¡¡ Abstract and  Dvi (or PDF) file of  Original papers

Grants, Awards, Honors, Prizes, Etc

• (2002³â) Çѱ¹ÇмúÁøÈïÀç´Ü  2002³âµµ ¸ÖƼ¹Ìµð¾î¸¦ ÀÌ¿ëÇÑ ÀÌ»ê¼öÇÐ µðÁöÅ»ÄÜÅÙÃ÷°³¹ß»ç¾÷ ¿¡ ½ÅûÁß, (PI : *** )
• (2002³â) Çѱ¹ÇмúÁøÈïÀç´Ü, ±âÃÊÇй® À°¼º »ç¾÷¿¡ ½ÅûÁß, (PI :ÀÌ»ó±¸)
• (2002³â) Çѱ¹°úÇÐÀç´Ü, Àü»ê¼öÇבּ¸¼¾ÅÍ , ÆÛ¸Ó³ÙÆ® ÇÔ¼ö¿¡ °üÇÑ ¿¬±¸-, (PI: Ȳ¼®±Ù),
• (2002³â) ¼º±Õ°ü´ëÇб³, ±³À°°³¹ß¿¬±¸¼ÒÀÇ  Àü°øº° ±³¼ö¹ý °³¹ß °úÁ¦, "ÀÚ¹Ù¿Í Ç÷¡½¬·Î ÇÏ´Â ¼±Çü´ë¼öÇÐÀ» ÅëÇÑ ¼öÇÐ ±³¼ö¹ýÀÇ °³¹ß", 100¸¸¿ø, (PI : ÀÌ»ó±¸)
• (2001-2003), ÇмúÁøÈïÀç´Ü ±âÃÊ°úÇבּ¸Áö¿ø, ´ë¼ö±¸Á¶¿Í ±× ÀÀ¿ë (PI : ±è¹Ì°æ)
• (2000³â) Çѱ¹ÇмúÁøÈïÀç´Ü  2000³âµµ ¸ÖƼ¹Ìµð¾î¸¦ ÀÌ¿ëÇÑ ´ëÇб³À° ¼±Çü´ë¼öÇÐ µðÁöÅ»ÄÜÅÙÃ÷°³¹ß»ç¾÷ , 2000 11-2001 11, 2700¸¸¿ø  °úÁ¦¹øÈ£ 2000-048-000001 (PI : ÀÌ»ó±¸)
• (2000³â) Çѱ¹±³À°°³¹ß¿ø, ¼öŹ¿¬±¸ CR2000-14 , ¿µÀç±³À°°úÁ¤ °³¹ß ¿¬±¸[II]- °íµîÇб³ ¿µÀç±³À°°úÁ¤ ½Ã¾È°³¹ßÀ» À§ÇÑ ±âÃÊ¿¬±¸, (PI: ±¸ÀÚ¾ï),
• (2000³â) Çѱ¹±³À°°úÁ¤Æò°¡¿ø, ÃÊ Áßµî ¼öÇб³À°ÀÇ ¸ñÇ¥ ¹× ³»¿ë ü°èÈ­ ¿¬±¸, (¹Úµµ¼ø, PI: ȲÇýÁ¤), ¿¬±¸ÀÚ·á ORM 2000-14
• (2001³â) Çѱ¹°úÇÐÀç´Ü, µÎ³úÇѱ¹ 21 BK 21-´ë¿ªÇؼ®Çаú °úÇаè»ê ¹× ±× ÀÀ¿ë III (Çٽɺоß)  (PI : À̿쿵), Project # ,  20,000,000 
• (2000³â) Çѱ¹°úÇÐÀç´Ü, µÎ³úÇѱ¹ 21 BK 21-´ë¿ªÇؼ®Çаú °úÇаè»ê¹× ±× ÀÀ¿ë II (Çٽɺоß)  (PI : À̿쿵), Project # ,  20,000,000
• (1999³â) Çѱ¹°úÇÐÀç´Ü, µÎ³úÇѱ¹ 21 BK 21-´ë¿ªÇؼ®Çаú °úÇаè»ê¹× ±× ÀÀ¿ë I (Çٽɺоß)  (PI : À̿쿵), Project # , 20,000,000 
• (2000³â) ¼º±ÕÇмú¿¬±¸ºñ "On the spectral norm and eigenvalues of $W\sb c$-companion matrices", 500¸¸¿ø, 1999. 12 - 2000. 12  (PI : ÀÌ»ó±¸)
• "Qualitative matrix theory", SungKyun Research Fund, SKKU, 1996. 12 - 1997. 12,  4,000,000 (S.G. Lee)
• "Analytic and Algebraic properties of operators", Basic Science Research Institute Program, Ministry of Education, Korea, Project no. BSRI-94-1420, 1994, 5.1-1995.4.30, \23,000,000 (PI: W.Y. Lee + 4)
• "Analytic and Algebraic properties of operators II", Basic Science Research Institute Program, Ministry of Education, Korea, Project no. BSRI-95-1420, 1995. 6.11-1996.6.10, \46,000,000 (PI: W.Y. Lee + 4)
• "Analytic and Algebraic properties of operators III" Basic Science Research Institute Program, Ministry of Education, Korea, Project no. BSRI-96-1420, 1996. 6.11-1997.6.10, \57,000,000, (PI: W.Y. Lee + 4)
• "Analytic and Algebraic properties of operators IV" Basic Science Research Institute Program, Ministry of Education, Korea, Project no. BSRI-97-1420 1997. 7.10-1998.7.11, \57,000,000, (PI: W.Y. Lee + 4)
• "Analytic and Algebraic properties of operators V" Basic Science Research Institute Program, Ministry of Education, Korea, Project no. BSRI-97-1420 1998. 11.1-1999.11.1, \50,000,000, (PI: W.Y. Lee + 4)
• Outstanding Students Awards, Math. Dept., Utah State University, 1988
• Rocky Mountain Math. Consortium Fellowship, 1987
• "ÀϹÝÀûÀÎ ºÎ¿ï´ë¼ö»ó¿¡¼­ Çà·Ä°è¼öµéÀÇ º¸Á¸ÀÚ", "1993³â 7.1-1994.6.30: ÇмúÁøÈïÀç´Ü, ±¹Á¦Çù·Â°úÁ¦, 1000¸¸¿ø.(PI : ¼Û¼®ÁØ, L. Beasley)
• "ºñÀ½Çà·ÄÀÇ ¿µÇ×°è¼ö¿Í ºÎÈ£Çà·ÄÀÇ Çã¿ë¼º¿¡ °üÇÑ ¿¬±¸, 1995.  9.1-1997.8.31(2³â): // ±³À°ºÎ, Çٽɿ¬±¸°úÁ¦  //     , 1600¸¸¿ø(PI : ¼Û¼®ÁØ, À̱¤¿¬, õ±â»ó)
• "¿ì¼¼È­ ´Ù¸éüÀÇ ±ØÁ¡°ú Çà·ÄÀÇ ¿µ¿ø¼Ò º¸Á¸¼º¿¡ °üÇÑ ¿¬±¸", 1998.10.1.-1999.9.30. ÇмúÁøÈïÀç´Ü, ÀÚÀ¯°ø¸ð°úÁ¦, 800¸¸¿ø, (PI: ¼Û¼®ÁØ, õ±â»ó)

http://matrix.skku.ac.kr/sglee/sglee-KRF-vita.htm

Papers Presented At Professional Meetings

Conferences Attended at which a paper was presented: (Çмú´ëȸ¹ßÇ¥)

 

62. Peking, China, Aug, 2002

61. Korea-Hungary Joint Workshop, July 5-7, 2002, Postech,

60.  The 10th ILAS Conference, Auburn, AL, USA,  2002. 6. 10- 6. 13, "Linear operators that strongly preserves the matrix majorization"

59. 2002. 5. 3. Invited Talk at Hanyang Univ., Seoul, "Some problems of Linear Transformation with Theory and Technology"

58. KMS Spring Meeting,  Hoseo Univ., Chunan, 2001, 4. 27 "How to use Flash and JAVA in our Linear Algebra class"

57. INTERNATIONAL CONFERENCE  on COMBINATORIAL MATRIX THEORY, Jan. 14- 17, 2002, POSTECH, Pohang, Korea., "JAVA matrix algorithms"

56.  The 9th ILAS Conference, Technion-Israel institute of Technology, Israel,  2001. 6. 25- 6. 29, "The Binet Formula and Representations of $k$-generalized Fibonacci Numbers"

55. Hungary-Korea Combinatorics Conference, Hungary Academy of Science 2001. 6. 11-6. 13,  "Representations of k-generalized Fibonacci Numbers"

54. KMS Spring Meeting,  Dongeui Univ., Pusan, 2001, 4. "¸ÖƼ¹Ìµð¾î¸¦ ÀÌ¿ëÇÑ ¼±Çü´ë¼öÇÐ µðÁöÅ»ÄÜÅÙÃ÷°³¹ß"

53. 2001. 2. 22. ÀÀ¿ë¼öÇаú ÃÊû°­¿¬ (â¿ø´ë),  "Majorization and Its Preservers"

52. 2001. 2. 20 - 21, (POSTECH), POHANG, KOREA ´ëÇѼöÇÐȸ Àü»ê¼öÇÐ ºÐ°ú 2001 ÇмúȸÀÇ, KOREA COMBINATORICS, GRAPH THEORY, ALGORITHMS and MATRIX THEORY SYMPOSIUM 2001, ¿¬±¸ ¹ßÇ¥, "A representation and some properties for k-Fibonacci sequences"

51. 2001. 1. 16. Çѱ¹¼öÇб³À°ÇÐȸ Çмú´ëȸ °­¿¬ (´Ü±¹´ë), "7Â÷ ±³À°°úÁ¤ÀÇ ¼öÇп¡¼­ °øÇÐÀû µµ±¸ÀÇ ÀÌ¿ë¿¡ °üÇÏ¿©" "  

50. 2000. 11. 21. ÀÚ¿¬´ë ÃÊû°­¿¬ (È£³²´ë),  "Mathematics and JAVA"

49. 2000. 10. 20-22. KMS Fall meeting (¿¬¼¼´ë),  "Equivalence of linear preservers on multivariate and directional majorization"

48. 2000. 10. 20-22. KMS Fall meeting (¿¬¼¼´ë), "Matrix decomposition and image processing via Mathematica"(with jung-Mo Yang, Duk-Sun Kim)

47. 2000. 10. 20-22. KMS Fall meeting (¿¬¼¼´ë), "Use of Technology in Linear Algebra ", (with Eun-Tae Kim and Kyung-Hun Chung)

46. 2000. 4. 22. The 2nd Korean CMT Meeting (°æºÏ´ë), "Preservers of multivariate and on matrix majorizations"

45. 2000. 4. 22. KMS Spring meeting (Æ÷Ç×°ø´ë), "Factorizations and eigenvalues of Fibonacci and symmetric Fibonacci matrices" (with Gwang-Yeon Lee and Jin-Soo Kim)

44. 2000. 4. 22. KMS Spring meeting (Æ÷Ç×°ø´ë), "On linear preservers of several multivariate majorization".

43. YanBian University  Visit, Dec.1999, (Áß±¹, ¿¬º¯´ë)"On Linear Preserver problems"

42. 1999. 10. 22-23. KMS Fall meeting (¿ø±¤´ë), "Linear operators preserving multivariate majorization", (with L. Beasley)

41. 1999. 10. 22-23. KMS Fall meeting (¿ø±¤´ë), "On the spectral norm and eigenvalues of W_ c-companion matrices. (with Jin-Soo Kim, Gwang-Yeon Lee, Seok-Zun Song)

29. The 7th International Linear Algebra Society Conference, Madison, Wisconsin, June 1-7 1998."Sign pattern matrices and it's related algorithm for the determination of L-matrix" (with H.G. Seol)."
30. " Web Based Instruction of LA & ATLAST Project", 1998 KMS Fall meeting, 1998, 8. 27-29
31. "Algorithms for the determination of L-matrix", 1998 KMS Fall Meeting, 1998, 8. 27-29
32. Univ. of Seoul,  March 1998, ¼öÇÐ ±³À°°ú ¿¬±¸¿¡¼­ ¼ÒÇÁÆ®¿þ¾î
33. Utah State University ,Oct.  15 1998,  Strong Preservers of Perron property.
34. The College of William & Mary, Nov. 21 1998, On a Fibonacci matrices.   1998
35. InHa University Symposium, A Characterization of Strong Preservers on  Multivariate Majorization, 1997. 6. 20.
36. Invited talk at Ajou University, Suwon, May 28, 1998
    "On Qualitative Matrix Theory"
37. Invited talk, International conference on Combinatorial Matrix Theory, "On the generalized Fibanacci Matrices", Changwon, Korea, Aug. 11-14, 1999
38. Combinatorial Matrix Theory Mini symposium, "Fibonacci sequences and matrices", Logan, UT, May 5-8, 1999
39. Colloquium talk, "Generalized Fibonacci sequences", The College of William & Mary, Williamsburg, VA, Nov. 21, 1998
40. Invited talk, "Perron property Preservers of Sign Pattern Matrices", Utah State University, Oct. 13, 1998

28. Áßµ¿°í¼öÇבּ¸¹ÝÃÊû°­¿¬, Nov. 15, 1997
    "Çà·ÄÀÌ·ÐÀÇ ¿ª»ç¿Í¿ì¸®ÇлýÀÇ¿ªÇÒ"
27. Fall meeting ofthe Korean Mathematical Society, Korea Univ., Seoul, Oct. 23-24, 1997
    "Introduction on Korean version of linear algebra practice program" (with H.G.Shin)
26. Fall meeting of the Korean Mathematical Society, Korea Univ., Seoul, Oct. 23-24, 1997
    "Idempotency on {1,-1}-matrices" (with S.W. Park)
25. DaeWoo PureMathematics Workshop, Ajou University, Suwon, July 8. 1997.
    "Linear preserver problems"
24. Regionalof the Korean Mathematical Society (Kyonggi-KangWon), InHa Univ., InChon, June 20-21, 1997
    "ATLAST Project : Education and Researches with Advanced Technique"
23. Invited talk at Coll.of Sci. University of Suwon, April 10, 1997.
    "Matrix Theory: It's Old days and Present,
22. Springmeeting of the Korean Mathematical Society, KyungHee Univ., Seoul,April 26, 1997
    "On an algorithm for the determination of L-matrix" (with H.K. Seol)
21. "MultivariateMajorization strongly preserving linear operators on matrices" (with Y.H.Lee and L.B.Beasley), July 8-12, 1996
    Prague Mathematical Conference 1996, Czech Republic
20. Fall meeting ofthe Korean Mathematical Society, Seoul Nat. Univ., Seoul,Oct. 26-27, 1996
    "Sign r-potent and sign-central matrices" (with G.Y. Lee)
19. Fall meeting of the Korean Mathematical Society, Seoul Nat. Univ., Seoul, Oct. 26-27, 1996
    "Linear operators strongly preserving multivariate majorization" (with Y.H. Lee)
18. International Workshopon Numerical Range and Numerical Radius, Hokkaido University, Sapporo, Hokkaido, Japan, Aug 5-10 1996.
    "Linear operators strongly preserving matrices whose sign-pattern require the Perron property."
17. DaeWooPure Mathematics Workshop, HanRim University, ChoonCheon,
    "Linear operators strongly preserving the sign require Perron property matrices."
16. Springmeeting of the Korean Mathematical Society, ChoongNam Nat. Univ., Taejon, April 27, 1996
    "Internet in Mathematics Research and Education"
15. Springmeeting of the Korean Mathematical Society, ChoongNam Nat. Univ., Taejon, April 27, 1996
    "Sign patterns with minimal semipositivity and inverse nonnegativity" (with H.K. Seol and S.W. Park)
14. Fall meeting of the Korean Mathematical Society, Pusan Nat. Univ., Pusan, Oct. 15-16, 1995
    "Sign Pattern Matrices". (with S.W. Park)
13. Operatortheory and Matrix theory Symposium, SungKyunKwan Univ. Suwon,June 13-14 1994,
    "Differential operator preservers" (with Y. M. Han)
12. Springmeeting of the Korean Mathematical Society, KAIST, Taejon, April, 1994,
    "Linear transformations that preserves Assignment II" (with G.Y. Lee)
11. Fall meeting of the Korean Mathematical Society, KyungPook Nat. Univ., Oct. 15-16, 1993
    "The Allowance of Idempotent of Sign Pattern Matrices". (with S.W. Park)
10. Fall meeting of the Korean Mathematical Society, KyungPook Nat. Univ., Oct. 15-16, 1993
    "On Generalized Fibonacci Numbers".
9. DaeWooPure Mathematics Workshop, Postech, Pohang, June 1993.
   "Linear transformations that preserves the Assignment on nonnegative matrices." (with G.Y. Lee)
8. DaeWooPure Mathematics Workshop, Postech, Pohang, June 1993.
   "Linear Algebra and Linear preserver problems"
7. Invitedtalk at BSRI of Cheju National University, April 1993.
   "On Linear preserver problems"
6. The third International Linear Algebra Society Conference, Pensacola, Florida, March 17-20 1993.
   "Linear transformation that preserve the assignment."
5. Springmeeting of the Korean Mathematical Society, Seoul National Univ., Apr. 24-25, 1992
   "Linear preservers over general Boolean semirings.
4. Fall meeting of the Korean Mathematical Society, KangWon Nat. Univ., Oct. 18-19, 1991
   "Linear Operators strongly preserving the polynomial equation p(X) = X over antinegative semirings.
3. Math.Asso. of America regional meeting, Rexburg, Idaho, April 1. 1991
   "Linear operators strongly preserving polynomials over semirings."
2. Math.Asso. of America regional meeting, Cedar City, Utah, April 6. 1990
   "Linear operators strongly preserving r-potent and r-cyclic matrices over semirings."
1. The 2nd International Linear Algebra Society Conference, Auburn, Alabama,March 1990.
   "Linear operators strongly preserving r-potent matrices over semirings."

¡¡

Professional Memberships

• American Mathematical Society
• Matheamtical Association of America
• Society for Industrial and Applied Mathematics
• Korean Mathematical Society
• International Linear Algebra Society
• SIAM Special Interest Group on Linear Algebra

Professional Activities

• Co-organizer of the the 2nd Korea-Hungary Joint Workshop, July 5-7, 2002, Postech,

Organizing Committe member of the INTERNATIONAL CONFERENCE  on COMBINATORIAL MATRIX THEORY Jan. 14 - Jan. 17, 2002 POSTECH, Pohang, Korea http://matrix.skku.ac.kr/sglee/postech/postech.htm, 100 participants from 50 universities and 20 countries attended

• Assisted to organize the first Korea-Hungary Joint Workshop, June , 200, Budapest, Hungary.

• Co-organizer of the 2001, (´ëÇѼöÇÐȸ Àü»ê¼öÇÐ ºÐ°ú 2001 ÇмúȸÀÇ) KOREA COMBINATORICS, GRAPH THEORY, ALGORITHMS and MATRIX THEORY SYMPOSIUM 2001 FEB., 20 - 21, 2001  POSTECH, POHANG, KOREA http://matrix.skku.ac.kr/sglee/postech/commath2001-postech.htm
• Organizer of the 1998 ¡¡Combinatorial Matrix Theory Symposium, Sungkyunkwan univ. May 9-10 1998. 60 participants from 15 universities attended
• Co-organizer of the 1994 Operator and Matrix Theory Symposium, June 1994. 150 participants from 16 universities attended
• Co-organizer of the 2000 ¼öÇаú Ư¼ºÈ­  ¸ðµ¨   °³¹ßÀ» À§ÇÑ ½ÉÆ÷Áö¿ò, Æ÷Ç×°ø´ë, July 2000. 100 participants from 20universities attended

¡¡

Scholarly Articles °ú  ¿¬±¸º¸°í¼­

19. À̻󱸿Ü, ¼öÇаú ±³À°¸ñÇ¥ ¹× ³»¿ë ü°è ¿¬±¸, (Ã¥ÀÓ: ³ª±Í¼ö), ¿¬±¸º¸°í RRC 2001-9, Çѱ¹±³À°°úÁ¤Æò°¡¿ø, 2001. 12.

18. ÀÌ»ó±¸,  "¼öÇÐÀÇ È²Á¦ °¡¿ì½º",  ¼º´ë½Å¹®, ¼­Æò, 2002

17. ÀÌ»ó±¸, ¡¸¸ÖƼ¹Ìµð¾î ¼±Çü´ë¼öÇÐ ÀÚ·áÀÇ °³¹ß°úÁ¤ ¼Ò°³¡¹,The Newsletter of the Korean Mathematical Society, V. 81. 28-33, 2002

16. À̻󱸿Ü, ¿µÀç±³À°°úÁ¤ °³¹ß ¿¬±¸[II]ÀÇ ºÎ·Ï III - ¼öÇаú ¿µÀç±³À°°úÁ¤ ½Ã¾È, (PI: ±¸ÀÚ¾ï), Çѱ¹±³À°°³¹ß¿ø, ¼öŹ¿¬±¸ CR2000-14-3 (2000) ISBN 89-8388-306-5 93370, ISBN 89-8388-304-9 93370.

15.   ÀÌ»ê¼öÇÐÀÇ ¼Ò°³, ¼öÇлç¶û,  (April, 2002).

14. 2000 ¼öÇаú Ư¼ºÈ­ ¸ðµ¨   °³¹ßÀ» À§ÇÑ ½ÉÆ÷Áö¿ò,  ÇÁ·Î½Ãµù, Æ÷Ç×°ø´ë,

13. À̻󱸿Ü, ¿µÀç±³À°°úÁ¤ °³¹ß ¿¬±¸[II]- °íµîÇб³ ¿µÀç±³À°°úÁ¤ ½Ã¾È°³¹ßÀ» À§ÇÑ ±âÃÊ¿¬±¸, (±¸ÀÚ¾ï), Çѱ¹±³À°°³¹ß¿ø, ¼öŹ¿¬±¸ CR2000-14 (2000), ISBN 89-8388-304-9 93370

12.  À̻󱸿Ü, ÃÊ Áßµî ¼öÇб³À°ÀÇ ¸ñÇ¥ ¹× ³»¿ë ü°èÈ­, (¹Úµµ¼ø), ¿¬±¸ÀÚ·á ORM 2000-14, Çѱ¹±³À°°úÁ¤Æò°¡¿ø, 2000

11.  À̻󱸿Ü, ¡¸2000 ´ëÀÔ¼öÇдɷ½ÃÇè(¼öÇÐ)¡¹, º¸°í¼­, Çѱ¹ ±³À° °úÁ¤ Æò°¡¿ø,

10. ÀÌ»ó±¸, "¼±Çü´ë¼öÇÐÀÇ °ú°Å¿Í ÇöÀç" ¼º´ë½Å¹®³í´Ü, 1998 4.20

9. ÀÌ»ó±¸, °­¿Á±â, ¡¸Çà·ÄÀÌ·ÐÀÇ ¹ßÀü°úÁ¤°ú ÇöÀ硹, The Newsletter of the Korean Mathematical Society, V. 55. 20-27, 1997

8. ÀÌ»ó±¸, "Á¢¼Ó°ú ÇØ°á" ¼º´ë½Å¹®, µ¹¹°¸ñ,1997
7. ÀÌ»ó±¸, ¡¸¹Ì·¡¸¦ »ì¾Æ°¥ ÇлýµéÀ» À§ÇÑ ¼öÇб³À°¡¹,¼ºµ¿¼öÇÐ, Ⱓȣ, pp.2-5, Áßµî¼öÇб³À°¿¬±¸È¸
6. À̻󱸿Ü, ¡¸97 ´ëÀÔ¼öÇдɷ½ÃÇè(¼öÇÐ)¡¹, º¸°í¼­, ±¹¸³±³À° Æò°¡¿ø,
5. À̻󱸿Ü, ¡¸96 ´ëÀÔ¼öÇдɷ½ÃÇè(¼öÇÐ)¡¹, º¸°í¼­, ±¹¸³±³À° Æò°¡¿ø,
4. ÀÌ»ó±¸, ¡¸´ëÇѼöÇÐȸÀÇ Á¤º¸¸¦ ¼¼°è¿Í °øÀ¯ÇÏÀÚ¡¹,The Newsletter of the Korean Mathematical Society, V. 50. 11-15, 1996
3. ÀÌ»ó±¸, ¡¸Internet and Korean Mathematical Society¡¹,The Newsletter of the Korean Mathematical Society, V. 47. 26-34, 1996
2. À̻󱸿Ü, "´ëÇѼöÇÐȸ HomePage ±¸¼º¾È I, II", ´ëÇѼöÇÐȸ Àü»êÀ§¿øȸº¸°í¼­,1997. 2., pp.1-35
1. ÀÌ»ó±¸¿Ü 4ÀÎ, ¡¸ÀÛ¿ë¼ÒÀÇ Çؼ®Àû ¹× ´ë¼öÀû ¼ºÁú (I, II, III)¡¹, ±³À°ºÎ BSRI-1420 º¸°í¼­, pp. 1-300

¡¡ ¡¡ ¡¡

Teaching (Çлý ¹èÃâ½ÇÀû):

• Produced four Ph.D. student : Dr. HanGuk Seol (1998), Dr. Se-Won Park (1996-Çö ¼­³²´ë±³¼ö), Dr. You-Ho Lee (1996-Çö °æ»ê´ë±³¼ö), JinSoo Kim (2000)
• Produced seven Master's students : Hee-Jung Chae(2002), Mr. DukSun Kim (2001), Mr. EunTae Kim(2000), Ms. JiYeon Hong(2000). Mr. JinTae Kim (1999), Mr. You-Hyuk Kim (1998), Mr. Sang-Do Kim (1993), Mr. Chang-Min Hong (1995),
• Worked with 5 Post Doc's - Prof. G.Y. Lee, Prof. G.S. Cheon, Prof. S.W. Park, Prof. You-Ho Lee
• Present  4¡¡Ph.D Students : JungMo Yang, ±è¸í¾Ö, ±è´ö¼±, (±èÀºÅÂ, Ȳ»ó¹Î, KyungHoon Chung)
• Present  2¡¡MS Student : ¹æÇö¹è, ¹é¸í±¹ , (YoungWhan Choi in the Army)¡¡ ¡¡

¡¡ ¡¡ ¡¡

Authored Books

1. Linear Algebra and Appl. (¼±Çü´ë¼öÇаúÀÀ¿ë), °æ¹®»ç(1998), Àú¼­ À̻󱸿Ü3ÀÎ, ISBN 89-7282-273-6
2. ¹ÌÀûºÐÇÐ, ÀÌ»ó±¸¿Ü 10ÀÎ, ¼º±Õ°ü´ë ÃâÆǺΠ(1999), ISBN 89-7986-237-7
3. ¹ÌÀûºÐÇÐ II ,  ¼º±Õ°ü´ë ¼öÇаú ±³Àç ÆíÂùÀ§¿øȸ (´ëÇ¥ÀúÀÚ ÀÌ»ó±¸) , ¼º±Õ°ü´ë ÃâÆǺΠ(2001), ISBN 89-7986-263-6
4. (°³Á¤) ¹ÌÀûºÐÇÐ, ÀÌ»ó±¸¿Ü 10ÀÎ, ¼º±Õ°ü´ë ÃâÆǺΠ(2002), ISBN 89-7986-484-1
5. ¼öÇÐ:Çü½Ä°ú ±â´É  [Mathematics : Form and Functions], ûÀ½»ç.¿ªÀú, ÀÌ»ó±¸¿Ü 4ÀÎ, (2001) ISBN 89-85534-12-2

¡¡ ¡¡ ¡¡

Academic Activity

19.     ´ë±³Çù ** Æò°¡À§¿ø, ÇмúÁøÈïÀç´Ü ** Æò°¡À§¿ø, °úÇÐÀç´Ü ** Æò°¡

18.        ICMI Çѱ¹Áöȸ,  ICMI 11 À¯Ä¡À§¿øȸ ÀÌ»ç, 2001. 2. 1. -present

17.       ´ëÇѼöÇÐȸ, Àü»êÀ§¿øȸ, Àü»êÀ§¿ø, 2001. 1.1. - 2002. 12. 31.

16.        ¼º±Õ°ü´ë, ¿ì¼ö°­»çÀ°¼º¿¬±¸À§¿øȸ À§¿ø,  2001. 3. 27 - 2001. 6. 30.

16.        ¼º±Õ°ü´ë, ´ëÇпø ¼öÇаúÀå, 2001. 3. 1. - 2003. 2. 28.

15.  ¡¡S.K.K.U. Head of Math. Department,  Mar. 1 2001 - Feb. 28. 2003

14.  ¡¡S.K.K.U.  Language Institute, Advisory Com. , Mar. 1 2000 - Feb. 28. 2002

13.  ¡¡S.K.K.U. Info. Center Advisory Com. , Mar. 20 1998 - Feb. 28. 2000

12. ¡¡KMS, Computational Mathematics Division Committee Member - Jan 1, 2000 - Dec. 31 2001
11. ¡¡S.K.K.U. ¡¡Units Evaluation Committee, ¡¡May - July 1998
10. ¡¡Open Cyber University. Dev. Com. , Mar. 1998 - Present
9. ¡¡S.K.K.U. Scholarship committee , Sep. 97-Aug. 1999
8. ¡¡S.K.K.U. Web Based Instruction Committee, Jan 1998- Jan ¡¡1999
7. ¡¡National College Entrance (SAT) Prob. Bank Committee, Aug.-Sep, 1997
6. ¡¡National College Degree Qualification Exam. Committee (Basic Courses), 1997 and 1998
5. ¡¡The Korean Math Society CS Committee, 1997. 1 - Present
4. ¡¡S.K.K.U. Curriculum reform committee, Sep.-Dec. 1995
3. ¡¡Refereed for J. of KMS, B. of KMS, Comm. of KMS, Linear & Multilinear Algebra, Linear Algebra and Its Appl.
2. ¡¡Member of National College Entrance (SAT) Examination Committee, Oct.-Nov., 1995, 1996 and 1999 and 2001.
1. ¡¡National  Mathematics Olympiad Comm., KMS, 1993-1997, 1997-1999

• (±³¿Ü ºÀ»ç:¡¡¿­¸°»çÀ̹ö´ëÇС¡ ±³°ú°³¹ß½Ç¹«ÃßÁøÀ§¿øȸÀ§¿ø, ±¹¸³±³À°Æò°¡¿ø ´ëÀÔ¼öÇдɷ½ÃÇèÃâÁ¦À§¿ø,¡¡´ëÇѼöÇÐȸ(KMS) Àü»êÀ§¿ø,  ´ëÇѼöÇÐȸ(KMS)Àü»ê¼öÇкаúÀ§¿ø, ¡¡´ëÇѼöÇÐȸ(KMS) ¼öÇпø²ÇǾƵåÃâÁ¦À§¿øµî)

  (±³³» ºÀ»ç: ¼º´ë´ÜÀ§±â°üÆò°¡À§¿ø, Á¤º¸Åë½Å¿ø ÀÚ¹®À§¿ø, ÀåÇÐÀ§¿ø, ±³°ú°úÁ¤À§¿ø, ¼º±Õ¾îÇпø ¿î¿µÀ§¿øµî),
  

    °æ·Â »çÇ×

 Education and Academic Experience

¡¡

Academic Experience

6.      Full Professor - SungKyunKwan Univ. 2001.4. 1. - present
7. ¡¡Visiting Associate Professor - Utah State Univ., UT, USA, Spring, 1999
5. ¡¡Visiting Associate Professor - The College of William & Mary , VA, USA, Fall, 1998
4. ¡¡Associate Professor - SungKyunKwan Univ. 1996.3 - 2001.3
3. ¡¡Assistant Professor -SungKyunKwan Univ. 1992.3.- 1996.2
2. ¡¡Instructor in Math - SungKyunKwan Univ. 1991-1992
1. ¡¡Teaching Fellow in Math - Utah State Univ. 1989-1991