# Publications & Presentations

## So, Wasin

### Publications & Presentations

- Wasin So. "Quadratic formulas for quaternions." Article. (January 2002).
- Wasin So. "On left eigenvalues of a quaternionic matrix." Article. (January 2001).
- Wasin So. "Singular values of matrix exponentials." Article. (January 2000).
- Wasin So. "Linear operators preserving the minimal rank." Article. (January 1999).
- Wasin So. "Rank one perturbation and its application to the laplacian spectrum of a graph." Article. (January 1999).
- Wasin So. "Eigenvalue inequalities and equalities." Article. (January 1998).
- Wasin So. "Isometric isomorphisms between normed spaces." Article. (January 1998).
- Wasin So. "The spectrum of a Hermitian matrix sum." Article. (January 1998).
- Wasin So. "Estimating the support of a scaling vector." Article. (January 1997).
- Wasin So. "Convexity of the upper complex palane part of the numerical range of a quaternioic matrix." Article. (January 1996).
- Wasin So. "Possibilities for the number of invariant polynomials of the difference of two similarity classes." Article. (January 1996).
- Wasin So. "Isometries of l(sub p)-norm." Article. (January 1994).
- Wasin So. "The numerical range of normal matrices with quaternion entries." Article. (January 1994).
- Wasin So. "Some explicit formulas for the matrix exponential." Article. (January 1993).
- Wasin So. "Equality cases in matrix exponential inequalities." Article. (January 1992).