Developer Reference

  • 2022.1
  • 12/20/2021
  • Public Content
Contents

DPOSV Example

The routine solves the real system of linear equations for
X
:
A*X = B
where
  • A
    is a square symmetric positive-definite matrix.
  • The columns of matrix
    B
    are individual right-hand sides.
  • The columns of
    X
    are the corresponding solutions.
The matrix
B
is overwritten by
X
.
The Cholesky decomposition is used to factor
A
as:
A
=
U
T
*
U
, if
uplo
= '
U
'
or
A
=
L
*
L
T
, if
uplo
= '
L
'
where
  • U
    is an upper triangular matrix.
  • L
    is a lower triangular matrix.
The factored form of
A
is then used to solve the system of equations
A
*
X
=
B
.

C Interface

Please refer to the Matrix Layout section of the C Interface Conventions for the description of Row Major (C default) and Column Major (Fortran default).

Product and Performance Information

1

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