SRC/dlarmm.f(3) | Library Functions Manual | SRC/dlarmm.f(3) |
NAME
SRC/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 60 of file dlarmm.f.
Author
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