Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

?gbrfs

Refines the solution of a system of linear equations with a general band coefficient matrix and estimates its error.

Syntax

call sgbrfs
(
trans
,
n
,
kl
,
ku
,
nrhs
,
ab
,
ldab
,
afb
,
ldafb
,
ipiv
,
b
,
ldb
,
x
,
ldx
,
ferr
,
berr
,
work
,
iwork
,
info
)
call dgbrfs
(
trans
,
n
,
kl
,
ku
,
nrhs
,
ab
,
ldab
,
afb
,
ldafb
,
ipiv
,
b
,
ldb
,
x
,
ldx
,
ferr
,
berr
,
work
,
iwork
,
info
)
call cgbrfs
(
trans
,
n
,
kl
,
ku
,
nrhs
,
ab
,
ldab
,
afb
,
ldafb
,
ipiv
,
b
,
ldb
,
x
,
ldx
,
ferr
,
berr
,
work
,
rwork
,
info
)
call zgbrfs
(
trans
,
n
,
kl
,
ku
,
nrhs
,
ab
,
ldab
,
afb
,
ldafb
,
ipiv
,
b
,
ldb
,
x
,
ldx
,
ferr
,
berr
,
work
,
rwork
,
info
)
call gbrfs
(
ab
,
afb
,
ipiv
,
b
,
x
[
,
kl
]
[
,
trans
]
[
,
ferr
]
[
,
berr
]
[
,
info
]
)
Include Files
  • mkl.fi
    ,
    lapack.f90
Description
The routine performs an iterative refinement of the solution to a system of linear equations
A*X
=
B
or
A
<