The PCTREVC/PZTREVC test program performs a right and left eigenvector calculation of a triangular matrix followed by a residual checks of the calculated eigenvectors.

The following tests will be performed on P_TREVC. The basic test is:

using the 1-norm. It also tests the normalization of .

where is the upper Hessenberg matrix, is the order of the matrix, is the j-th eigenvector, and m-norm is the max-norm of a vector, and represents PxLAMCH( ICTXT, 'P' ). The max-norm of a complex n-vector in this case is the maximum of + over .

Susan Blackford 2001-08-12