.TH "SRC/dgetc2.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*- .ad l .nh .SH NAME SRC/dgetc2.f .SH SYNOPSIS .br .PP .SS "Functions/Subroutines" .in +1c .ti -1c .RI "subroutine \fBdgetc2\fP (n, a, lda, ipiv, jpiv, info)" .br .RI "\fBDGETC2\fP computes the LU factorization with complete pivoting of the general n-by-n matrix\&. " .in -1c .SH "Function/Subroutine Documentation" .PP .SS "subroutine dgetc2 (integer n, double precision, dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv, integer, dimension( * ) jpiv, integer info)" .PP \fBDGETC2\fP computes the LU factorization with complete pivoting of the general n-by-n matrix\&. .PP \fBPurpose:\fP .RS 4 .PP .nf DGETC2 computes an LU factorization with complete pivoting of the n-by-n matrix A\&. The factorization has the form A = P * L * U * Q, where P and Q are permutation matrices, L is lower triangular with unit diagonal elements and U is upper triangular\&. This is the Level 2 BLAS algorithm\&. .fi .PP .RE .PP \fBParameters\fP .RS 4 \fIN\fP .PP .nf N is INTEGER The order of the matrix A\&. N >= 0\&. .fi .PP .br \fIA\fP .PP .nf A is DOUBLE PRECISION array, dimension (LDA, N) On entry, the n-by-n matrix A to be factored\&. On exit, the factors L and U from the factorization A = P*L*U*Q; the unit diagonal elements of L are not stored\&. If U(k, k) appears to be less than SMIN, U(k, k) is given the value of SMIN, i\&.e\&., giving a nonsingular perturbed system\&. .fi .PP .br \fILDA\fP .PP .nf LDA is INTEGER The leading dimension of the array A\&. LDA >= max(1,N)\&. .fi .PP .br \fIIPIV\fP .PP .nf 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)\&. .fi .PP .br \fIJPIV\fP .PP .nf 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)\&. .fi .PP .br \fIINFO\fP .PP .nf INFO is INTEGER = 0: successful exit > 0: if INFO = k, U(k, k) is likely to produce overflow if we try to solve for x in Ax = b\&. So U is perturbed to avoid the overflow\&. .fi .PP .RE .PP \fBAuthor\fP .RS 4 Univ\&. of Tennessee .PP Univ\&. of California Berkeley .PP Univ\&. of Colorado Denver .PP NAG Ltd\&. .RE .PP \fBContributors:\fP .RS 4 Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden\&. .RE .PP .PP Definition at line \fB110\fP of file \fBdgetc2\&.f\fP\&. .SH "Author" .PP Generated automatically by Doxygen for LAPACK from the source code\&.