pptrs: triangular solve using factor

Functions
subroutine	cpptrs (uplo, n, nrhs, ap, b, ldb, info)
	CPPTRS
subroutine	dpptrs (uplo, n, nrhs, ap, b, ldb, info)
	DPPTRS
subroutine	spptrs (uplo, n, nrhs, ap, b, ldb, info)
	SPPTRS
subroutine	zpptrs (uplo, n, nrhs, ap, b, ldb, info)
	ZPPTRS

Detailed Description