# cgesc2.f man page

cgesc2.f —

## Synopsis

### Functions/Subroutines

subroutinecgesc2(N, A, LDA, RHS, IPIV, JPIV, SCALE)CGESC2solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

## Function/Subroutine Documentation

### subroutine cgesc2 (integerN, complex, dimension( lda, * )A, integerLDA, complex, dimension( * )RHS, integer, dimension( * )IPIV, integer, dimension( * )JPIV, realSCALE)

**CGESC2** solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

**Purpose:**

```
CGESC2 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 CGETC2.
```

**Parameters:**

*N*

```
N is INTEGER
The number of columns of the matrix A.
```

*A*

```
A is COMPLEX array, dimension (LDA, N)
On entry, the LU part of the factorization of the n-by-n
matrix A computed by CGETC2: A = P * L * U * Q
```

*LDA*

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

*RHS*

```
RHS is COMPLEX 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:**

September 2012

**Contributors:**

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

Definition at line 116 of file cgesc2.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

cgesc2(3) is an alias of cgesc2.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK