CURRICULUM VITAE

Department of Mathematics

Seoul National University

Seoul 151-742, KOREA

+82-2-880-1435; FAX +82-2-887-4694; wylee@math.snu.ac.kr

A. EDUCATION

B.Sc., Sungkyunkwan University, 1981

M.Sc., Sungkyunkwan University, 1983

Ph.D., Sungkyunkwan University, 1988

B. APPOINTMENTS

Kwandong University

Assistant Professor, Dept. of Mathematics, 3/84--2/89

Sungkyunkwan University

Assistant Professor, Dept. of Mathematics, 3/89--2/91

Associate Professor, Dept. of Mathematics, 3/91--2/96

Professor, Dept. of Mathematics, 3/96—2/03

Chair, Dept. of Mathematics, 3/97--2/99

Director, Institute of Basic Science, 2/02--2/03

Seoul National University

Professor, Dept. of Mathematics, 3/03—present

University of Regina, Canada

Visiting Professor, Dept. of Mathematics, 2/95--7/95

Utah State University, USA

Visiting Professor, Dept. of Mathematics, 8/95--2/96

University of Iowa, USA

Visiting Professor, Dept. of Mathematics, 6/97--8/97, 12/97--2/98, 12/98--2/99, 6/99--8/99, 6/2000--7/2000, 7/2003-8/2003

C. AWARDS AND MEMBERSHIPS

Academic Awards, Korean Mathematical Society, 2001

Member, Korean Mathematical Society

Member, American Mathematical Society

D. FIELDS OF RESEARCH

Operator Theory, Functional Analysis

E. PUBLICATIONS

Books and Research Monographs

2001 1. Joint hyponormality of Toeplitz pairs, Memoirs of the American Mathematical Society, 712, Amer. Math. Soc. Providence , 2001 (with R.E. Curto)

Articles (all refereed)

1990 1. Relatively open mappings, Proc. Amer. Math. Soc. 108 (1990) , 93--94

1991 2. Almost invertibility modulo closed ideals, Bull. Korean Math. Soc. 28 (1991) , 185—190 (with Y.T.Kim and H.J.Lee)

1992 3. Boundaries of the spectra in L(X), Proc. Amer. Math. Soc. 116 (1992) , 185--189

4. The index property for weakly Fredholm operators, Math. Japo. 38 (1993), 7—10 (with D.H.Lee)

5. The essential spectrum of a regular operator, Bull. Korean Math. Soc. 29 (1992), 295—300 (with H.Y.Lee and Y.M.Han)

6. Almost regular operators, J. Korean Math. Soc. 29 (1992), 401—407 (with C.I.Choi)

1993 7. A generalization of the punctured neighborhood theorem, Proc. Amer. Math. Soc. 117 (1993), 7—10

8. The punctured neighborhood theorem for incomplete spaces, J. Operator Theory 30 (1993), 217—226 (with R.E. Harte)

1994 9. On the Taylor-Weyl spectrum, Acta Sci. Math. (Szeged)} 59(1) (1994), 187—193 (with I.H.Jeon)

1995 11. An index formula for chains, Studia Math. 116(3) (1995). 283—294 (with R.E.Harte)

12. Isolated points of the Taylor-Weyl spectrum, Hokkaido Math. J. 24(2) (1995), 337—345 (with I.H.Jeon)

1996 13. A spectral mapping theorem for the Weyl spectrum, Glasgow Math. J. 38(1) (1996), 61—64 (with S.H.Lee)

14. Hyponormality and spectra of Toeplitz operators, Trans. Amer. Math. Soc. 348(10) (1996), 4153—4174 (with D.R.Farenick)

15. Normal Toeplitz matrices, SIAM J. Matrix Anal. Appl. 17(4) (1996), 1037—1043 (with D.R.Farenick, M.Krupnik and N.Krupnik)

16. On a spectral property of analytic operators, Tsukuba J. Math. 20(12) (1996), 379—385 (with I.H.Jeon and J.C.Kim)

1997 18. On the bounded closure of the range of an operator, Proc. Amer. Math. Soc. 125(8) (1997), 2313—2318 (with R.E.Harte)

19. On a positive linear map of preserving absolute values, Linear Algebra Appl. 260 (1997), 311—318 (with L.B.Beasley and A.H.Kim)

20. On hyponormal Toeplitz operators with polynomial and circulant-type symbols, Integral Equations Operator Theory 29(2) (1997), 202—210 (with D.R.Farenick)

21. A note on the punctured neighbourhood theorem, Glasgow Math. J. 39(3) (1997), 269—273 (with R.E.Harte)

22. Another note on Weyl's theorem, Trans. Amer. Math. Soc. 349(5) (1997), 2115—2124 (with R.E.Harte)

1998 23. On the continuity of spectra of Toeplitz operators, Archive Math. (Basel) 70(1) (1998), 66—73 (with I.S.Hwang)

24. On hyponormal Toeplitz operators with polynomial and symmetric-type symbols, Integral Equations Operator Theory 32(1) (1998), 216—233 (with I.H.Kim)

25. Weyl's theorem for operator matrices, Integral Equations Operator Theory 32(2) (1998), 319--331

1999 26. Hyponormality of Toeplitz operators with polynomial symbols, Math. Ann. 313(2) (1999), 247—261 (with I.S. Hwang and I.H. Kim)

27. On the structure of polynomially compact operators, Math. Z. 232(2) (1999), 257—263 (with Y.M. Han and S.H. Lee)

2000 28. Invertible completions of $2\times 2$ upper triangular operator matrices, Proc. Amer. Math. Soc. 128(1) (2000), 119—123 (with J.K.Han and H.Y.Lee)

29. Weyl's theorem holds for algebraically hyponormal operators, Proc. Amer. Math. Soc. 128(8) (2000), 2291—2296 (with Y.M. Han)

30. Riesz and Aiena Operators, Rend. Circ. Mat. Palermo 58 (2000), 391—394 (with R.E. Harte)

31. A folk theorem on Furuta inequality, Sci. Math. 3(2) (2000), 391—394 (with M. Cho, T. Furuta, and J.I. Lee)

32. The spectrum is continuous on the set of p-hyponormal operators, Math. Z. 235 (2000), 151—157 (with I.S. Hwang)

33. One-step extension of the Bergman shift, Proc. Amer. Math. Soc. 128(12) (2000), 3639—3646 (with Y.B. Choi and J.K. Han)

34. Putnam's inequality of doubly commuting n--tuple for log-hyponormal operators, Proc. Royal Irish Acad. 100A(2) (2000), 163-169 (with M. Cho and B.P. Duggal)

2001 35. Weyl spectra of operator matrices, Proc. Amer. Math. Soc. 129(1)(2001), 131-138

36. The boundedness below of $2\times 2$ upper triangular operator matrices, Integral Equations Operator Theory 39(3)(2001), 267—276 (with I.S. Hwang)

37. Hyponormality of Toeplitz operators with polynomial symbols: An extremal case, Math. Nach. 231 (2001), 25—38 (with I.H. Kim and I.S. Hwang)

39. Weyl spectra and Weyl's theorem, Studia Math. 148(3) (2001), 193—206 (with Y.M.Han)

2002 40. Extensions and extremality of recursive weighted shifts, Proc. Amer. Math. Soc. 130(2) (2002), 565-576 (with R.E. Curto, Il Bong Jung)

41. The reduced minimum modulus of operators, J. Math. Anal. Appl. 267 (2002), 679—694 (with I.S. Hwang)

42. Hyponormality of trigonometric Toeplitz operators, Trans. Amer. Math. Soc. 354 (2002), 2461-2474 (with I.S. Hwang)

43. On generalized Riesz points, J. Operator Theory 42 (2002), 187—196 (with R.E.Harte and L.L.Littlejohn)

44. Triangular Toeplitz contractions and Cowen's sets for analytic polynomials, Proc. Amer. Math. Soc., 130 (2002), 3597-3604 (with C. Muneo and R. Curto)

45. Towards a model theory for 2-hyponormal operators, Integral Equations Operator Theory,44(2002) no.3, 290-315 (with R.E. Curto)

46. Subnormality and 2-hyponormality for Toeplitz operators, Integral Equations Operator Theory, 44(2002), no.2, 138-148 (with R.E. Curto and S. H. Lee)

47. Weak subnormality of operators, Archiv Math. (Basel), 79(2002), no.5, 360-371 (with R.E. Curto and I.S. Hwang)

2003 48. Subnormality and k-hyponormality of Toeplitz operators: A brief survey and open questions, Proceedings of Le Congres International des Mathematiques de Rabat,

(M. Mbekhta, ed.), The Theta Foundation, Bucharest, Romania, 73-81 (2003) (with R.E. Curto)

49. Solution of the quadratically hyponormal competion problem, Proc. Amer. Math. Soc. 131(8) (2003), 2479-2489 (with R.E. Curto)

50. On M-hyponormal weighted shifts, J. Math. Analy. Appl . 286(2003), 116-124 (with J. S. Ham and S. H. Lee)

F. LECTURES AT CONFERENCES

1989 1. Proper operators and precore operators in L(X,Y), '89 Fall Meeting of KMS, Pohang Univ., October 1989.

1990 2. L*-component of L(X,Y), '90 Spring Meeting of KMS, Inha Univ., April 1990.

3. Boundaries of the spectra in L(X), '90 Fall Meeting of KMS, Ihwa Univ., October, 1990.

1991 4. Decomposably regular operators, '91 TGRC-KOSEF Operator Theory Conference Kyungpook Univ., January, 1991.

5. Weyl and Browder spectra, '91 Spring Meeting of KMS, Sung Kyun Kwan Univ., April 1991.

6. The punctured neighbourhood theorem, '91 Fall Meeting of KMS, Kangwon Univ.,October 1991.

7. The essential point spectrum of a regular operator, '92 Spring Meeting of KMS, Kukmin Univ., April 1992.

8. A punctured neighbourhood theorem for commuting pairs, '92 Fall Meeting of KMS, Seoul National Univ., October 1992.

1993 9. Taylor-Weyl spectra, '93 GARC-KOSEF 2nd Conference, Seoul National Univ., February 1993

10. The analyticity of bounded linear operators, '93 Pure and Applied Math Workshop, Pohang Univ., July 1993

12. Kato's jump and West's theorem, '93 Fall Meeting of KMS, Kyungpook Univ., October 1993

1994 13. On a spectral equivalence, '94 Spring Meeting of KMS, KAIST, April 1994

14. A spectral mapping theorem for the Weyl spectrum, '94 Fall Meeting of KMS, 31(2), 25--25 , Korea Educational Univ., October 1994

15. An index formula for chains, '94 TGRC-KOSEF Operator Theory Conference, Kyungpook Univ., December 1994

1996 16. Spectral theory of Toeplitz operators, Special session in '96 Spring Meeting of KMS, 33(1), 28-28, Chungnam Univ., April 1996

17. Browder's theorem and Riesz points, '96 Spring Meeting of KMS, 33(1), 6--6 Chungnam Univ., April 1996

18. Weyl and Browder theory, '96 TGRC-KOSEF Operator Theory Conference, Kyungpook Univ., June 1996

19. Hyponormal Toeplitz operators with circulant-type symbols, '96 Fall Meeting of KMS, 33(2), 34—34, Seoul National Univ., October 1996

1997 20. On a positive linear map preserving absolute values, '97 Spring Meeting of KMS, 34(1), 32-32, Kyung Hee Univ., April 1997

21 On hyponormal Toeplitz operators with polynomial and symmetric-type symbols, '97 Spring Meeting of KMS, 34(1), 33-33, Kyung Hee Univ., April 1997

22. Hyponormality of Toeplitz operators with polynomial symbols, '97 Fall Meeting of KMS, 34(2), 28-28, Korea Univ., October 1997

1998 23. The gap between 2-hyponormality and subnormality, '98 Spring Meeting of KMS, 35(1), 14—14, Hannam Univ., April 1998

24. On the structure of polynomially compact operators, '98 Spring Meeting of KMS, 35(1), 15—15, Hannam Univ., April 1998

25. On weighted shifts, '98 KOTAC Operator Theory Conference, 98 Abstract, 8—8, Sungkyunkwan University--International Conference, June 1998

26. Hyponormality of Toeplitz operators with polynomial symbols, '98 Fall Meeting of KMS, 35(2), 27—27, Jeju National Univ., August 1998

27. Weyl's theorem holds for algebraically hyponormal operators, '98 Fall Meeting f KMS, 35(2), 27—27, Jeju National Univ., August, 1998

28. Eight problems in hyponormality, Regional Conference on hyponormality and its applications, Kyungpook National Univ., November 1998

1999 29. Subnormality of Toeplitz operators, '99 Spring Meeting of KMS, 36(1), 15--15 Dugsung Univ., April 1999

30. On hyponormal Toeplitz operators, '99 Spring Meeting of KMS, 36(1), 16--16 Dugsung Univ., April 1999

31. Spectral properties for operator matrices, '99 Spring Meeting of KMS, 36(1), 17—17, Dugsung Univ., April 1999

32. Six problems in hyponormality of operators, `99 KOTAC Operator Theory Conference, 99 Proceedings 141—154, Taegu University, June 1999

33. Subnormality and $2$--hyponormality of Toeplitz operators, The second Korea-Taiwan Symposium on Mathematics, Abstract 3—4,

34. Weyl spectra and Weyl's theorem, '99 Fall Meeting of KMS, 36(2), 15--15 (Wonkwang Univ.); October 22, 1999

35. Hyponormality of trigonometric Toeplitz operators, '99 Fall Meeting of KMS, 36(2), 16--16 (Wonkwang Univ.); October 22, 1999

2000 36. On $2$--hyponormal operators, '99 RIMS Conference at the Kyoto University, Kyoto University; January 6--7, 2000

37. Hyponormality of trigonometric Toeplitz operators, 2000 Spring Meeting of KMS, 37(1), 18--18 (POSTECH); April 22, 2000

2001 38. Subnormality and hyponormality for Toeplitz operators, 2001 Fall Meeting of KMS, 38(2), 2--2 (Ehwa Womans Univ); October 19, 2001

2002 39. On the invariant subspace problem, 2002 Spring Meeting of KMS, 39(1), 29--29 (Hoseo Univ); April 27, 2002

40. Hyponormality and subnormality for Toeplitz operators, 2002 KOTAC Operator Theory Conference, 4 -- (Keimyung Univ); July 4-7 , 2002

2003 41. Hyponormal Toeplitz operators, 2003 Spring Meeting of KMS, 40(1), 14--14 (Sogang Univ); April 26, 2003

42. Hyponormality and subnormality of Toeplitz operators, Internationl Symposium of Operator Theory, Abstracts(Kanagawa Univ, Japan); August 19-21,2003

43. 2-hyponormal Toeplitz operators, 2003 Fall Meeting of KMS, 40(2), 25--25 (Chungbook National Univ); October 24-25, 2003

G. OTHER ACTIVITIES

1. Organizer of the 1998 - 2003 KOTAC Operator Theory Conferences

2. Organizer of the Korean Mathematical Society 2000: Mathematics in the New Millennium

H. PROFESSIONAL SERVICE

Organizer, Korean Mathematical Society (1999-2000)

Editor for Bulletin of the Korean Mathematical Society (1995-1997)

Editor for Communications of the Korean Mathematical Society (1998-2000)

Editor-in-Chief for Journal of the Korean Mathematical Society (2001-2002)

Editor for Journal of the Korean Mathematical Society (2001- )

Reviewer for Mathematical Reviews (2000- )

Reviewer for Zentralblatt Mathematik (2003-)

Recent Referee (Since 1999)

1999 Proceedings of the American Mathematical Society

Acta Science Math. (Szeged)

2001 Transactions of the American Mathematical Society

2002 Journal of Operator Theory

2003 Proceedings of the American Mathematical Society (2 reports)

Journal of Functional Analysis

2004 Proceedings of the American Mathematical Society

Journal of Functional Analysis

I. Ph.D. Dissertation Directed

Hong Youle Lee, Woosuk University, Associate Professor, August 1996

In Ho Jeon, Ewha Womans University, Research Professor, February 1997

Yong Bin Choi, Sungkyunkwan University, Research Scholar, February 1998

Young Min Han, KyungHee University, Assistant Professor, February 1999

In Hyoun Kim, Seoul National University, Post-Doc, February 2000

In Sung Hwang, Sungkyunkwan University, Assistant Professor, February 2001

Jun Ik Lee, Sang Myung University, Assistant Professor, February 2001

Woo Young Lee