# dlat2s.f - Man Page

SRC/dlat2s.f

## Synopsis

### Functions/Subroutines

subroutine **dlat2s** (uplo, n, a, lda, sa, ldsa, info)**DLAT2S** converts a double-precision triangular matrix to a single-precision triangular matrix.

## Function/Subroutine Documentation

### subroutine dlat2s (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, real, dimension( ldsa, * ) sa, integer ldsa, integer info)

**DLAT2S** converts a double-precision triangular matrix to a single-precision triangular matrix.

**Purpose:**

DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE PRECISION triangular matrix, A. RMAX is the overflow for the SINGLE PRECISION arithmetic DLAS2S checks that all the entries of A are between -RMAX and RMAX. If not the conversion is aborted and a flag is raised. This is an auxiliary routine so there is no argument checking.

**Parameters***UPLO*UPLO is CHARACTER*1 = 'U': A is upper triangular; = 'L': A is lower triangular.

*N*N is INTEGER The number of rows and columns of the matrix A. N >= 0.

*A*A is DOUBLE PRECISION array, dimension (LDA,N) On entry, the N-by-N triangular coefficient matrix A.

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

*SA*SA is REAL array, dimension (LDSA,N) Only the UPLO part of SA is referenced. On exit, if INFO=0, the N-by-N coefficient matrix SA; if INFO>0, the content of the UPLO part of SA is unspecified.

*LDSA*LDSA is INTEGER The leading dimension of the array SA. LDSA >= max(1,M).

*INFO*INFO is INTEGER = 0: successful exit. = 1: an entry of the matrix A is greater than the SINGLE PRECISION overflow threshold, in this case, the content of the UPLO part of SA in exit is unspecified.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **110** of file **dlat2s.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dlat2s(3) is an alias of dlat2s.f(3).

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK