· Teaching at UTPA:

Fall 2009:

Math 6352.01, Analysis I

Math 1460.08, Calculus I

Summer 2 2009:

Math 1342.01, Business Calculus

Math 4357.01, Real Analysis

• The schedules of classes and office hours (Fall 2009)

Monday	Tuesday	Wednesday	Thursday	Friday
Colloquium 4:00pm--5:00pm MAGC 1.302		Applied Math Seminar 3:30pm--4:30pm MAGC 1.302		Meeting with Dr. Curto for research 10:00am--11:00am
Office Hours 4:40pm--5:40pm MAGC 3.734		Office Hours 4:40pm--5:40pm MAGC 3.734	Office Hours 4:40pm--5:40pm MAGC 3.530 Math lab II
5:45pm--7:00pm Math 1460.08 MAGC 1.302		5:45pm--7:00pm Math 1460.08 MAGC 1.302	5:45pm--7:00pm Math 1460.08 MAGC 1.302
7:10pm--8:25pm Math 6352.01 MAGC 1.302		7:10pm--8:25pm Math 6352.01 MAGC 1.302	Office Hours 7:00pm--9:00pm MAGC 3.734

Beside office hours please call for an appointment 956-381-3633 or

Email: yoonj@utpa.edu

· Publications list:

1. On Regular Elements in a Normed Algebra, 22 pp.

M.S. Thesis, Sungkyunkwan University, South Korea, February 1993.

2. Structure and spectral theory of hyponormal multivariable weighted shifts, 153 pp.

Ph.D. Dissertation, The University of Iowa, August 2003.

3. Subnormality of Bergman-like weighted shifts,

J. Math. Anal. Appl., 308(2005), 334-342 (with R.E. Curto & Y.T. Poon).

4. k-hyponormality of multivariable weighted shifts,

J. Funct. Anal., 15(2005), 462-480 (with R.E. Curto & S.H. Lee).

5. Disintegration-of-measure techniques for commuting multivariable weighted shifts,

Proc. London Math. Soc., 92(2006), 381-402 (with R.E. Curto).

6. Jointly hyponormal pairs of subnormal operators need not be subnormal,

Trans. Amer. Math. Soc., 358(2006), 5139-5159 (with R.E. Curto).

7. Spectral pictures of 2-variable weighted shifts,

C. R. Acad. Sci. Paris, 343(2006), 579–584 (with R.E. Curto).

8. Schur product techniques for commuting 2-variable weighted shifts,

J. Math. Anal. Appl., 333(2007), 626-641.

9. Hyponormality and subnormality for powers of pairs of subnormal operators,

J. Funct. Anal., 245(2007), 390-412 (with R.E. Curto & S.H. Lee).

10. Propagation phenomena for hyponormal 2-variable weighted shifts,

J. Operator Theory, 58:1(2007), 101-130 (with R.E. Curto).

11. Quadratically hyponormal recursively generated weighted shifts need not be

positively quadratically hyponormal,

Integral Equations Operator Theory, 58(2007), 551-562 (with Y.T. Poon).

12. Disintegration of measures and contractive 2-variable weighted shifts,

Integral Equations Operator Theory, 59 (2007), no. 2, 281--298.

13. Reconstruction of the Berger measure when the core is of tensor form,

Bibl. Rev. Mat. Iberoamericana, (2007), 317-331 (with R.E. Curto & S.H. Lee)

14. Which 2-hyponormal 2-variable weighted shifts are subnormal?,

Linear Algebra Appl. 429 (2008), no. 8-9, 2227-2238

(with R.E. Curto & S.H. Lee).

Preprints (articles submitted or to be submitted soon)

15. New approach to the 2-variable subnormal completion problem,

approximately 15pp, in preprint form, submitted (with R.E. Curto & S.H. Lee).

16. When is hyponormality for 2-variable weighted shifts invariant under powers?

approximately 33pp, in preprint form, submitted (with R.E. Curto).

17. Subnormality of arbitrary powers of 2-variable weighted shifts whose cores are of tensor form,

approximately 18pp, in preprint form, submitted (with R.E. Curto & S.H. Lee).

18. Existence of subnormal 2-variable weighted shifts with 9 prescribed initial weights,

approximately 13pp, in preprint form (with R.E. Curto & S.H. Lee).

19. Spectral pictures of hyponormal multivariable weighted shifts,

approximately 38pp, in preprint form (with R.E. Curto).

20. Spectral pictures of subnormal multivariable weighted shifts,

approximately 20pp, in preprint form (with R.E. Curto).

21. Spectral picture of non-hyponormal multivariable weighted shifts,

approximately 22pp, in preprint form (with R.E. Curto).

In preparation

1. A solution of the quadratically hyponormal completion problem with two equal weights and its application,

approximately 13pp. in preprint form (with Y.T. Poon).

2. Propagation phenomena for weighted shifts.

3. 2-variable weighted shifts with flatness.

4. Completion problem of finite Hankel partial contraction.

5. The gap theory of multivariable operators.

6. Note on weak k-hyponormality in multivariable operators.

7. Double commutants of multivariable weighted shifts (with R.E. Curto).

8. Taylor spectra, essential Taylor spectra and C*-algebras of multivariable weighted shifts (with R.E. Curto).