stevx: eig, bisection

Functions
subroutine	dstevx (jobz, range, n, d, e, vl, vu, il, iu, abstol, m, w, z, ldz, work, iwork, ifail, info)
	DSTEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices
subroutine	sstevx (jobz, range, n, d, e, vl, vu, il, iu, abstol, m, w, z, ldz, work, iwork, ifail, info)
	SSTEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices

Detailed Description