Contents

# mkl_?coosv

Solves a system of linear equations for a sparse matrix in the coordinate format (deprecated).

## Syntax

Include Files
• mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the
Intel® MKL
The
mkl_?coosv
routine solves a system of linear equations with matrix-vector operations for a sparse matrix in the coordinate format:
`y := alpha*inv(A)*x`
or
`y := alpha*inv(AT)*x,`
where:
alpha
is scalar,
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 a coordinate format both with one-based indexing and zero-based indexing.
Input Parameters
transa
Specifies the system of linear equations.
If
transa
=
'N'
or
'n'
, then
y
:=
alpha
*inv(
A
)*
x
If
transa
=
'T'
or
't'
or
'C'
or
'c'
, then
y
:=
alpha
*inv(
A
T
)*
x
,
m
Number of rows of the matrix
A
.
alpha
Specifies the scalar
alpha
.
matdescra
Array of six elements, specifies properties of the matrix used for operation. Only first four array elements are used, their possible values are given in
Table “Possible Values of the Parameter
matdescra
(
descra
)”
. Possible combinations of element values of this parameter are given in
Table “Possible Combinations of Element Values of the Parameter
matdescra
.
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
nnz
.
For one-based indexing, contains the row indices plus one for each non-zero element of the matrix
A
.
For zero-based indexing, 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
.
For one-based indexing, contains the column indices plus one for each non-zero element of the matrix
A
.
For zero-based indexing, 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 at least
m
.
On entry, the array
x
must contain the vector
x
. The elements are accessed with unit increment.
y
Array, size at least
m
.
On entry, the array
y
must contain the vector
y
. The elements are accessed with unit increment.
Output Parameters
y
Contains solution vector
x
.

#### Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804