_lat2_(3)                  Library Functions Manual                  _lat2_(3)

NAME
       _lat2_ - <em>lat2</em>: triangular matrix, convert double <=> single

SYNOPSIS
   Functions
       subroutine dlat2s (uplo, n, a, lda, sa, ldsa, info)
           DLAT2S converts a double-precision triangular matrix to a
           single-precision triangular matrix.
       subroutine zlat2c (uplo, n, a, lda, sa, ldsa, info)
           ZLAT2C converts a double complex triangular matrix to a complex
           triangular matrix.

Detailed Description
Function 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.

   subroutine zlat2c (character uplo, integer n, complex*16, dimension( lda, *
       ) a, integer lda, complex, dimension( ldsa, * ) sa, integer ldsa,
       integer info)
       ZLAT2C converts a double complex triangular matrix to a complex
       triangular matrix.

       Purpose:


            ZLAT2C converts a COMPLEX*16 triangular matrix, SA, to a COMPLEX
            triangular matrix, A.

            RMAX is the overflow for the SINGLE PRECISION arithmetic
            ZLAT2C 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 COMPLEX*16 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 COMPLEX 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 zlat2c.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0                       _lat2_(3)