drzt02.f - Man Page

double precision function drzt02 (m, n, af, lda, tau, work, lwork)
DRZT02

DRZT02

Purpose:

 DRZT02 returns
      || I - Q'*Q || / ( M * eps)
 where the matrix Q is defined by the Householder transformations
 generated by DTZRZF.

Parameters

M

          M is INTEGER
          The number of rows of the matrix AF.

N

          N is INTEGER
          The number of columns of the matrix AF.

AF

          AF is DOUBLE PRECISION array, dimension (LDA,N)
          The output of DTZRZF.

LDA

          LDA is INTEGER
          The leading dimension of the array AF.

TAU

          TAU is DOUBLE PRECISION array, dimension (M)
          Details of the Householder transformations as returned by
          DTZRZF.

WORK

          WORK is DOUBLE PRECISION array, dimension (LWORK)

LWORK

          LWORK is INTEGER
          length of WORK array. LWORK >= N*N+N*NB.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 89 of file drzt02.f.