f07aef

f07aef © Numerical Algorithms Group, 2002.

Purpose

F07AEF Solution of real system of linear equations, multiple right-hand sides, matrix already factorized by F07ADF (SGETRS/DGETRS)

Synopsis

[b,info] = f07aef(a,ipiv,b<,trans>)

Description

 
                                                     T         
 To solve a real system of linear equations AX=B or A X=B, this 
 routine must be preceded by a call to F07ADF which computes the 
 LU factorization of A as A=PLU. The solution is computed by 
 forward and backward substitution.
 
 If TRANS = 'N', the solution is computed by solving PLY=B and 
 then UX=Y.
 
                                                             T   
 If TRANS = 'T' or 'C', the solution is computed by solving U Y=B 
           T T   
 and then L P X=Y.

Parameters

f07aef

Required Input Arguments:

a (:,:)                               real
ipiv (:)                              integer
b (:,:)                               real

Optional Input Arguments:                       <Default>

trans (1)                             string   'n'

Output Arguments:

b (:,:)                               real
info                                  integer