debian man page for pdlamch

PDLAMCH(l)					      LAPACK auxiliary routine (version 1.5)						PDLAMCH(l)

NAME
       PDLAMCH - determine double precision machine parameters

SYNOPSIS
       DOUBLE PRECISION FUNCTION PDLAMCH( ICTXT, CMACH )

	   CHARACTER	CMACH

	   INTEGER	ICTXT

PURPOSE
       PDLAMCH determines double precision machine parameters.

ARGUMENTS
       ICTXT   (global input) INTEGER
	       The BLACS context handle in which the computation takes place.

       CMACH   (global input) CHARACTER*1
	       Specifies the value to be returned by PDLAMCH:
	       = 'E' or 'e',   PDLAMCH := eps
	       = 'S' or 's ,   PDLAMCH := sfmin
	       = 'B' or 'b',   PDLAMCH := base
	       = 'P' or 'p',   PDLAMCH := eps*base
	       = 'N' or 'n',   PDLAMCH := t
	       = 'R' or 'r',   PDLAMCH := rnd
	       = 'M' or 'm',   PDLAMCH := emin
	       = 'U' or 'u',   PDLAMCH := rmin
	       = 'L' or 'l',   PDLAMCH := emax
	       = 'O' or 'o',   PDLAMCH := rmax

	       where

       eps   = relative machine precision
	     sfmin  = safe minimum, such that 1/sfmin does not overflow base  = base of the machine prec  = eps*base t	   = number of (base) dig-
	     its in the mantissa rnd   = 1.0 when rounding occurs in addition, 0.0 otherwise emin  = minimum exponent before  (gradual)  underflow
	     rmin    =	 underflow  threshold  -  base**(emin-1)  emax	 =  largest  exponent  before  overflow  rmax	=  overflow  threshold	 -
	     (base**emax)*(1-eps)

LAPACK version 1.5						    12 May 1997 							PDLAMCH(l)