Welcome to Wasin So's Presentation Page

 

Past Presentations (until 2001)

  1.  ``Singular values of matrix exponentials'', 
    Fourth SIAM Conference on Linear Algebra in Signals, Systems and Control, Boston MA, August 13--15, 2001.
  2.  ''A tale of solving polynomials in two algebras'',
    SJSU Colloquium, San Jose CA, March 1, 2001.
  3. ''Quadratic formulas for quaternions'',
    AMS-MAA Joint National Meeting, New Orleans LA, January 10--13, 2000.
  4.  ``Extendible elements of the alternating group'', 
    AMS-MAA Joint National Meeting, Washington DC, January 19--22, 2000.
  5.  ``Product of exponentials: results and conjectures'',
    Invited talk at the 8th ILAS Conference, Barcelona, Spain, July 1999.
  6. ``Exponential formulas and spectral indices'',
    Workshop on geometric and combinatorial methods in the Hermitian spectral sum problem , Coimbra, Portugal, July 1999.
  7. ``Existence of quaternionic eigenvalues'',
    Institute of Mathematics and Software, Xiangtan Polytechnic University, Hunan, China, May 1999.
  8.  ``Computation of quaternionic eigenvalues'',
    Institute of Mathematics and Software, Xiangtan Polytechnic University, Hunan, China, May 1999.
  9.  ``Quaternions: origin, properties, applications and generalization'',
    Institute of Mathematics and Software, Xiangtan Polytechnic University, Hunan, China, June 1999.
  10. ``Singualr values of matrix exponentials'',
    Institute of Computational and Applied Mathematics. Xiangtan University, Hunan, China, June 1999.
  11.  ``Convexity of quaternionic numerical range '',
    Institute of Mathematics and Software, Xiangtan Polytechnic University, Hunan, China, June 1999.
  12.  ``Computation of upper bild'',
    Institute of Mathematics and Software, Xiangtan Polytechnic University, Hunan, China, June 1999.
  13.  ``Linear operators preserving minimal ranks'',
    Invited talk at the Linear Preserver Problems Conference, Lisbon, Portugal, January 1999.
  14. ``Minimial rank and its linear preservers'',
    Invited talk at the Matrix Theory Conference, Hong Kong, December 1998.
  15. ``Rank one perturbation and Laplacian Spectrum'',
    Southern California Matrix Conference, San Jose, CA, November 1998.
  16. ``Fundamental similarity of matrix symbols'',
    SIAM Annual Meeting, Toronto, Canada, July 1998.
  17. ``Linear operators preserving reduced ranks''
    7th ILAS Conference, Madison, WI, June 1998.
  18. ``Different parts of the quaternionic numerical range'',
    3rd Numerical ranges and radii workshop, Madison, WI, June, 1998.
  19.  ``On preserving structured matrices using double bracket operator'', 
    SIAM Annual Meeting, Stanford CA, July 1997.
  20.  ``An explicit criterion for the convexity of quaternionic numerical range'',
    AMS-MAA Joint National Meeting, San Diego, January 1997.
  21. ``Different parts of the quaternionic numerical range'',
    University of Hong Kong, Hong Kong, June, 1996.
  22. ``Support properties of multiscaling function'',
    Invited talk at the International Conference on Harmonic Analysis and Wavelet Analysis, Beijing, China, June 1996.
  23. ``Eigenvalues of sums of Hermitian matrices'', 
    National Changhua University of Education, Changhua, Taiwan, May 1996.
  24. ``Difference of two similarity classes'', 
    Tamkang University, Tamsui, Taiwan, May 1996.
  25. ``Estimating the support of a scaling vector'', 
    SIAM Annual Meeting, Charlotte, NC, October 1995.
  26.  ``Standard inequalities for the sum and product of Hermitian matrices'', 
    5th ILAS Conference, Atlanta, GA, August 1995.
  27. ``Isometric isomorphisms between normed spaces", 
    University of Texas, Austin, TX, March 1995.
  28. ``Possible numbers of invariant polynomials for the difference of two similarity classes", 
    Invited talk at the Workshop on Recent Advance of Linear Algebra, Lisbon, Portugal, January 1995.
  29.  ``Isometries of l_p-norms", 
    AMS-MAA Joint National Meeting, San Francisco, CAJanuary 1995.
  30. ``Preserving singular values and displacement rank", 
    First Southeastern Linear Algebra Conference, Chattanooga, TN, May 1994.
  31. ``On the diagonal elements and eigenvalues of a Hermitian matrix -- a historical account",
    University of Lisbon, Portugal, December 1993. 
  32. ``Isometric isomorphisms between some finite dimensional normed spaces", 
    University of Lisbon, Portugal, November 1993. 
  33.  ``Weyl's inequalities and its applications'', 
    University of Coimbra, Portugal, August 1993.
  34.  ``Equivalence of spectral inequalities for sum and product'', 
    University of Lisbon, Portugal, June 1993.
  35. ``Spectral problem: multiplicative version'', 
    University of Lisbon, Portugal, June 1993. 
  36.  ``Characterization of an eigenvalue of a product of positive definite Hermitian matrices'',
    University of Lisbon, Portugal, May 1993. 
  37. ``On the converse of a theorem'', 
    3rd ILAS Conference, Pensacola, FL, March 1993.
  38. ``Eigenvalues for sum of Hermitian matrices'', 
    Institute for Mathematics and its Applications, Minneapolis, MN, March 1992.
  39. ``Eigenvalues inequalities of matrix exponentials'', 
    Invited talk at the California State University, Hayward, February 1992.
  40.  ``Spectral inequalities and matrix exponentials'', 
    San Jose State University, San Jose, February 1992.
  41. ``Eigenvalues inequalities of matrix exponentials'', 
    National University of Singapore, Singapore, February 1992.
  42.  ``Trace inequalities of matrix exponentials'',
    Institute for Mathematics and its Applications, Minneapolis, MN, November 1991.
  43. ``Numerical range of matrices with quaternionic entries'', 
    College of William and Mary, Williamsburg, VA, November 1991.
  44. ``Equality cases of matrix exponential inequalities'', 
    AMS-MAA Joint National Meeting, San Francisco, CA, January 1991.
  45. ``Equality case of Bernstein inequality'',
    Southern California Matrix Conference, Santa Barbara, CA, November 1990.
  46. ``Exponential Map'', 
    Southern California Matrix Conference, Santa Barbara, CA, November 1988.