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.

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.

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

December 2016

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