gbtrf: triangular factor

Functions
subroutine	cgbtrf (m, n, kl, ku, ab, ldab, ipiv, info)
	CGBTRF
subroutine	dgbtrf (m, n, kl, ku, ab, ldab, ipiv, info)
	DGBTRF
subroutine	sgbtrf (m, n, kl, ku, ab, ldab, ipiv, info)
	SGBTRF
subroutine	zgbtrf (m, n, kl, ku, ab, ldab, ipiv, info)
	ZGBTRF

Detailed Description