Public Member Functions
real(kind=wp) function	wp_lnrel (X)

real(kind=ep1) function	ep_lnrel (X)
	Quad precision version of wp_lnrel. More...

Member Function/Subroutine Documentation

◆ ep_lnrel()

real(kind=ep1) function special_functions_gbl::cfp_lnrel::ep_lnrel ( real(kind=ep1) X )

Quad precision version of wp_lnrel.

◆ wp_lnrel()

real(kind=wp) function special_functions_gbl::cfp_lnrel::wp_lnrel ( real(kind=wp) X )

***PURPOSE  Evaluate ln(1+X) accurate in the sense of relative error.
***LIBRARY   SLATEC (FNLIB)
***CATEGORY  C4B
***TYPE      REAL(kind=wp) (ALNREL-S, wp_lnrel-D, CLNREL-C)
***KEYWORDS  ELEMENTARY FUNCTIONS, FNLIB, LOGARITHM
***AUTHOR  Fullerton, W., (LANL)
***DESCRIPTION

 wp_lnrel(X) calculates the REAL(kind=wp) natural logarithm of
 (1.0+X) for REAL(kind=wp) argument X.  This routine should
 be used when X is small and accurate to calculate the logarithm
 accurately (in the relative error sense) in the neighborhood
 of 1.0.

 Series for ALNR       on the interval -3.75000E-01_wp to  3.75000E-01_wp
                                        with weighted error   6.35E-32
                                         log weighted error  31.20
                               significant figures required  30.93
                                    decimal places required  32.01

***REFERENCES  (NONE)
***ROUTINES CALLED  F1MACH, cfp_csevl, cfp_initds, XERMSG
***REVISION HISTORY  (YYMMDD)
   770601  DATE WRITTEN
   890531  Changed all specific intrinsics to generic.  (WRB)
   890531  REVISION DATE from Version 3.2
   891214  Prologue converted to Version 4.0 format.  (BAB)
   900315  CALLs to XERROR changed to CALLs to XERMSG.  (THJ)

The documentation for this interface was generated from the following file:

/home/jacob/Work/codes/UKRmol/gitlab/ukrmol-in/source/gbtolib/source/special_functions.f90

Public Member Functions

Member Function/Subroutine Documentation

◆ ep_lnrel()

◆ wp_lnrel()