Contents

# mkl_cspblas_?cootrsv

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

## Syntax

Include Files
• mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the
Intel® oneAPI Math Kernel Library
Inspector-executor Sparse BLAS interface instead.
The
mkl_cspblas_?cootrsv
routine solves a system of linear equations with matrix-vector operations for a sparse matrix stored in the coordinate format with zero-based indexing:
`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 zero-based indexing of the input arrays.
Input Parameters
uplo
Specifies whether the upper or low triangle of the matrix
A
is considered.
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
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
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
Number of rows of the matrix
A
.
val
Array of length
nnz
, contains non-zero elements of the matrix
A
in the arbitrary order.
Refer to
values
array description in Coordinate Format for more details.
rowind
Array of length , contains the row indices for each non-zero element of the matrix
A
.
Refer to
rows
array description in Coordinate Format for more details.
colind
Array of length
nnz
, contains the column indices for each non-zero element of the matrix
A
. Refer to
columns
array description in Coordinate Format for more details.
nnz
Specifies the number of non-zero element of the matrix
A
.
Refer to
nnz
description in Coordinate Format for more details.
x
Array, size is
m
.
On entry, the array
x
must contain the vector
x
.
Output Parameters
y
Array, size at least
m
.
Contains the vector
y
.

#### Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.