EXPINT

NAME

PDL::GSLSF::EXPINT - PDL interface to GSL Special Functions

DESCRIPTION

This is an interface to the Special Function package present in the GNU Scientific Library.

SYNOPSIS

Functions

FUNCTIONS

gsl_sf_expint_E1

  Signature: (double x(); double [o]y(); double [o]e())

E_1(x) := Re[ Integrate[ Exp[-xt]/t, {t,1,Infinity}] ]

gsl_sf_expint_E2

  Signature: (double x(); double [o]y(); double [o]e())

E_2(x) := Re[ Integrate[ Exp[-xt]/t^2, {t,1,Infity}] ]

gsl_sf_expint_Ei

  Signature: (double x(); double [o]y(); double [o]e())

Ei(x) := PV Integrate[ Exp[-t]/t, {t,-x,Infinity}]

gsl_sf_Shi

  Signature: (double x(); double [o]y(); double [o]e())

Shi(x) := Integrate[ Sinh[t]/t, {t,0,x}]

gsl_sf_Chi

  Signature: (double x(); double [o]y(); double [o]e())

Chi(x) := Re[ M_EULER + log(x) + Integrate[(Cosh[t]-1)/t, {t,0,x}] ]

gsl_sf_expint_3

  Signature: (double x(); double [o]y(); double [o]e())

Ei_3(x) := Integral[ Exp[-t^3], {t,0,x}]

gsl_sf_Si

  Signature: (double x(); double [o]y(); double [o]e())

Si(x) := Integrate[ Sin[t]/t, {t,0,x}]

gsl_sf_Ci

  Signature: (double x(); double [o]y(); double [o]e())

Ci(x) := -Integrate[ Cos[t]/t, {t,x,Infinity}]

gsl_sf_atanint

  Signature: (double x(); double [o]y(); double [o]e())

AtanInt(x) := Integral[ Arctan[t]/t, {t,0,x}]

AUTHOR

This file copyright (C) 1999 Christian Pellegrin <chri@infis.univ.trieste.it> All rights reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution. If this file is separated from the PDL distribution, the copyright notice should be included in the file.

The GSL SF modules were written by G. Jungman.