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SRC/lapack_64_obj/dlarmm.f(3) Library Functions Manual SRC/lapack_64_obj/dlarmm.f(3)

NAME

SRC/lapack_64_obj/dlarmm.f

SYNOPSIS

Functions/Subroutines


double precision function DLARMM (anorm, bnorm, cnorm)
DLARMM

Function/Subroutine Documentation

double precision function DLARMM (double precision anorm, double precision bnorm, double precision cnorm)

DLARMM

Purpose:

!>
!> DLARMM returns a factor s in (0, 1] such that the linear updates
!>
!>    (s * C) - A * (s * B)  and  (s * C) - (s * A) * B
!>
!> cannot overflow, where A, B, and C are matrices of conforming
!> dimensions.
!>
!> This is an auxiliary routine so there is no argument checking.
!>

Parameters

ANORM 

!>          ANORM is DOUBLE PRECISION
!>          The infinity norm of A. ANORM >= 0.
!>          The number of rows of the matrix A.  M >= 0.
!>

BNORM

!>          BNORM is DOUBLE PRECISION
!>          The infinity norm of B. BNORM >= 0.
!>

CNORM

!>          CNORM is DOUBLE PRECISION
!>          The infinity norm of C. CNORM >= 0.
!>


References: C. C. Kjelgaard Mikkelsen and L. Karlsson, Blocked Algorithms for Robust Solution of Triangular Linear Systems. In: International Conference on Parallel Processing and Applied Mathematics, pages 68--78. Springer, 2017.

Definition at line 61 of file dlarmm.f.

Author

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