The TRD test program generates random symmetric test matrices with values in the interval [-1,1], calls the ScaLAPACK routines to reduce the test matrix to symmetric tridiagonal form, and computes a reduction residual error check to verify that each operation has performed correctly.

Specifically, each test matrix is subjected to the following tests:

- Reduce the symmetric matrix to symmetric tridiagonal form using PxSYTRD
- .

- and compute the ratio
*FRESID*

Susan Blackford 2001-08-12