## Developer Reference

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

# mkl_?diatrsv

Triangular solvers with simplified interface for a sparse matrix in the diagonal format with one-based indexing (deprecated).

## Syntax

Include Files
• mkl.fi
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the
Intel® MKL
The
mkl_?diatrsv
routine solves a system of linear equations with matrix-vector operations for a sparse matrix stored in the diagonal format:
`A*y = x`
or
`AT*y = x,`
where:
x
and
y
are vectors,
A
is a sparse upper or lower triangular matrix with unit or non-unit main diagonal,
A
T
is the transpose of
A
.
This routine supports only one-based indexing of the input arrays.
Input Parameters
Parameter descriptions are common for all implemented interfaces with the exception of data types that refer here to the FORTRAN 77 standard types. Data types specific to the different interfaces are described in the section
"Interfaces"
below.
uplo
CHARACTER*1
.
Specifies whether the upper or low triangle of the matrix
A
is used.
If
uplo
=
'U'
or
'u'
, then the upper triangle of the matrix
A
is used.
If
uplo
=
'L'
or
'l'
, then the low triangle of the matrix
A
is used.
transa
CHARACTER*1
.
Specifies the system of linear equations.
If
transa
=
'N'
or
'n'
, then
A
*
y
=
x
If
transa
=
'T'
or
't'
or
'C'
or
'c'
, then
A
T
*
y
=
x
,
diag
CHARACTER*1
.
Specifies whether
A
is unit triangular.
If
diag
=
'U'
or
'u'
, then
A
is unit triangular.
If
diag
=
'N'
or
'n'
, then
A
is not unit triangular.
m
INTEGER
.
Number of rows of the matrix
A
.
val
REAL
for
mkl_sdiatrsv
.
DOUBLE PRECISION
for
mkl_ddiatrsv
.
COMPLEX
for
mkl_cdiatrsv
.
DOUBLE COMPLEX
for
mkl_zdiatrsv
.
Two-dimensional array of size
lval
by
ndiag
, contains non-zero diagonals of the matrix
A
. Refer to
values
array description in Diagonal Storage Scheme for more details.