LAPACK 3.12.0
LAPACK: Linear Algebra PACKage
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subroutine zgbtrs | ( | character | trans, |
integer | n, | ||
integer | kl, | ||
integer | ku, | ||
integer | nrhs, | ||
complex*16, dimension( ldab, * ) | ab, | ||
integer | ldab, | ||
integer, dimension( * ) | ipiv, | ||
complex*16, dimension( ldb, * ) | b, | ||
integer | ldb, | ||
integer | info | ||
) |
ZGBTRS
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ZGBTRS solves a system of linear equations A * X = B, A**T * X = B, or A**H * X = B with a general band matrix A using the LU factorization computed by ZGBTRF.
[in] | TRANS | TRANS is CHARACTER*1 Specifies the form of the system of equations. = 'N': A * X = B (No transpose) = 'T': A**T * X = B (Transpose) = 'C': A**H * X = B (Conjugate transpose) |
[in] | N | N is INTEGER The order of the matrix A. N >= 0. |
[in] | KL | KL is INTEGER The number of subdiagonals within the band of A. KL >= 0. |
[in] | KU | KU is INTEGER The number of superdiagonals within the band of A. KU >= 0. |
[in] | NRHS | NRHS is INTEGER The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. |
[in] | AB | AB is COMPLEX*16 array, dimension (LDAB,N) Details of the LU factorization of the band matrix A, as computed by ZGBTRF. U is stored as an upper triangular band matrix with KL+KU superdiagonals in rows 1 to KL+KU+1, and the multipliers used during the factorization are stored in rows KL+KU+2 to 2*KL+KU+1. |
[in] | LDAB | LDAB is INTEGER The leading dimension of the array AB. LDAB >= 2*KL+KU+1. |
[in] | IPIV | IPIV is INTEGER array, dimension (N) The pivot indices; for 1 <= i <= N, row i of the matrix was interchanged with row IPIV(i). |
[in,out] | B | B is COMPLEX*16 array, dimension (LDB,NRHS) On entry, the right hand side matrix B. On exit, the solution matrix X. |
[in] | LDB | LDB is INTEGER The leading dimension of the array B. LDB >= max(1,N). |
[out] | INFO | INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value |
Definition at line 136 of file zgbtrs.f.