# sgesc2.f - Man Page

## Synopsis

### Functions/Subroutines

subroutine **sgesc2** (**N**, A, **LDA**, RHS, IPIV, JPIV, SCALE)**SGESC2** solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

## Function/Subroutine Documentation

### subroutine sgesc2 (integer N, real, dimension( lda, * ) A, integer LDA, real, dimension( * ) RHS, integer, dimension( * ) IPIV, integer, dimension( * ) JPIV, real SCALE)

**SGESC2** solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

**Purpose:**

SGESC2 solves a system of linear equations A * X = scale* RHS with a general N-by-N matrix A using the LU factorization with complete pivoting computed by SGETC2.

**Parameters:***N*N is INTEGER The order of the matrix A.

*A*A is REAL array, dimension (LDA,N) On entry, the LU part of the factorization of the n-by-n matrix A computed by SGETC2: A = P * L * U * Q

*LDA*LDA is INTEGER The leading dimension of the array A. LDA >= max(1, N).

*RHS*RHS is REAL array, dimension (N). On entry, the right hand side vector b. On exit, the solution vector X.

*IPIV*IPIV is INTEGER array, dimension (N). The pivot indices; for 1 <= i <= N, row i of the matrix has been interchanged with row IPIV(i).

*JPIV*JPIV is INTEGER array, dimension (N). The pivot indices; for 1 <= j <= N, column j of the matrix has been interchanged with column JPIV(j).

*SCALE*SCALE is REAL On exit, SCALE contains the scale factor. SCALE is chosen 0 <= SCALE <= 1 to prevent owerflow in the solution.

**Author:**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**December 2016

**Contributors:**Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden.

Definition at line 116 of file sgesc2.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page sgesc2(3) is an alias of sgesc2.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK