sbdt02.f - Man Page

TESTING/EIG/sbdt02.f

Synopsis

Functions/Subroutines

subroutine sbdt02 (m, n, b, ldb, c, ldc, u, ldu, work, resid)
SBDT02

Function/Subroutine Documentation

subroutine sbdt02 (integer m, integer n, real, dimension( ldb, * ) b, integer ldb, real, dimension( ldc, * ) c, integer ldc, real, dimension( ldu, * ) u, integer ldu, real, dimension( * ) work, real resid)

SBDT02

Purpose:

 SBDT02 tests the change of basis C = U**H * B by computing the
 residual

    RESID = norm(B - U * C) / ( max(m,n) * norm(B) * EPS ),

 where B and C are M by N matrices, U is an M by M orthogonal matrix,
 and EPS is the machine precision.
Parameters

M

          M is INTEGER
          The number of rows of the matrices B and C and the order of
          the matrix Q.

N

          N is INTEGER
          The number of columns of the matrices B and C.

B

          B is REAL array, dimension (LDB,N)
          The m by n matrix B.

LDB

          LDB is INTEGER
          The leading dimension of the array B.  LDB >= max(1,M).

C

          C is REAL array, dimension (LDC,N)
          The m by n matrix C, assumed to contain U**H * B.

LDC

          LDC is INTEGER
          The leading dimension of the array C.  LDC >= max(1,M).

U

          U is REAL array, dimension (LDU,M)
          The m by m orthogonal matrix U.

LDU

          LDU is INTEGER
          The leading dimension of the array U.  LDU >= max(1,M).

WORK

          WORK is REAL array, dimension (M)

RESID

          RESID is REAL
          RESID = norm(B - U * C) / ( max(m,n) * norm(B) * EPS ),
Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 111 of file sbdt02.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

The man page sbdt02(3) is an alias of sbdt02.f(3).

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