LAPACK 3.12.0
LAPACK: Linear Algebra PACKage

Functions  
subroutine  cgbtf2 (m, n, kl, ku, ab, ldab, ipiv, info) 
CGBTF2 computes the LU factorization of a general band matrix using the unblocked version of the algorithm.  
subroutine  dgbtf2 (m, n, kl, ku, ab, ldab, ipiv, info) 
DGBTF2 computes the LU factorization of a general band matrix using the unblocked version of the algorithm.  
subroutine  sgbtf2 (m, n, kl, ku, ab, ldab, ipiv, info) 
SGBTF2 computes the LU factorization of a general band matrix using the unblocked version of the algorithm.  
subroutine  zgbtf2 (m, n, kl, ku, ab, ldab, ipiv, info) 
ZGBTF2 computes the LU factorization of a general band matrix using the unblocked version of the algorithm.  