cgbtrs man page on IRIX

Man page or keyword search:  
man Server   31559 pages
apropos Keyword Search (all sections)
Output format
IRIX logo
[printable version]



CGBTRS(3F)							    CGBTRS(3F)

NAME
     CGBTRS - solve 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 CGBTRF

SYNOPSIS
     SUBROUTINE CGBTRS( TRANS, N, KL, KU, NRHS, AB, LDAB, IPIV, B, LDB, INFO )

	 CHARACTER	TRANS

	 INTEGER	INFO, KL, KU, LDAB, LDB, N, NRHS

	 INTEGER	IPIV( * )

	 COMPLEX	AB( LDAB, * ), B( LDB, * )

PURPOSE
     CGBTRS 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 CGBTRF.

ARGUMENTS
     TRANS   (input) 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)

     N	     (input) INTEGER
	     The order of the matrix A.	 N >= 0.

     KL	     (input) INTEGER
	     The number of subdiagonals within the band of A.  KL >= 0.

     KU	     (input) INTEGER
	     The number of superdiagonals within the band of A.	 KU >= 0.

     NRHS    (input) INTEGER
	     The number of right hand sides, i.e., the number of columns of
	     the matrix B.  NRHS >= 0.

     AB	     (input) COMPLEX array, dimension (LDAB,N)
	     Details of the LU factorization of the band matrix A, as computed
	     by CGBTRF.	 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.

     LDAB    (input) INTEGER
	     The leading dimension of the array AB.  LDAB >= 2*KL+KU+1.

									Page 1

CGBTRS(3F)							    CGBTRS(3F)

     IPIV    (input) INTEGER array, dimension (N)
	     The pivot indices; for 1 <= i <= N, row i of the matrix was
	     interchanged with row IPIV(i).

     B	     (input/output) COMPLEX array, dimension (LDB,NRHS)
	     On entry, the right hand side matrix B.  On exit, the solution
	     matrix X.

     LDB     (input) INTEGER
	     The leading dimension of the array B.  LDB >= max(1,N).

     INFO    (output) INTEGER
	     = 0:  successful exit
	     < 0:  if INFO = -i, the i-th argument had an illegal value

									Page 2

[top]

List of man pages available for IRIX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net