Hermitian/symmetric positive definite matrix: Cholesky, tridiagonal

Modules
	ptsv: Cholesky factor and solve
	ptsvx: Cholesky factor and solve, expert
	--- computational routines ---
	ptcon: Cholesky condition number estimate
	pttrf: Cholesky triangular factor
	pttrs: Cholesky triangular solve using factor
	ptts2: Cholesky triangular solve using factor, unblocked
	ptrfs: Cholesky iterative refinement

Detailed Description