table of contents
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sptt01.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sptt01.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sptt01.f
SYNOPSIS¶
Functions/Subroutines¶
subroutine SPTT01 (n, d, e, df, ef, work, resid)
SPTT01
Function/Subroutine Documentation¶
subroutine SPTT01 (integer n, real, dimension( * ) d, real, dimension( * ) e, real, dimension( * ) df, real, dimension( * ) ef, real, dimension( * ) work, real resid)¶
SPTT01
Purpose:
!> !> SPTT01 reconstructs a tridiagonal matrix A from its L*D*L' !> factorization and computes the residual !> norm(L*D*L' - A) / ( n * norm(A) * EPS ), !> where EPS is the machine epsilon. !>
Parameters
N
!> N is INTEGER !> The order of the matrix A. !>
D
!> D is REAL array, dimension (N) !> The n diagonal elements of the tridiagonal matrix A. !>
E
!> E is REAL array, dimension (N-1) !> The (n-1) subdiagonal elements of the tridiagonal matrix A. !>
DF
!> DF is REAL array, dimension (N) !> The n diagonal elements of the factor L from the L*D*L' !> factorization of A. !>
EF
!> EF is REAL array, dimension (N-1) !> The (n-1) subdiagonal elements of the factor L from the !> L*D*L' factorization of A. !>
WORK
!> WORK is REAL array, dimension (2*N) !>
RESID
!> RESID is REAL !> norm(L*D*L' - A) / (n * norm(A) * EPS) !>
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 90 of file sptt01.f.
Author¶
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Version 3.12.0 | LAPACK |