- removed inert Diff() function; only Derivative() remains

[ginac.git] / ginac / inifcns.h

diff --git a/ginac/inifcns.h b/ginac/inifcns.h
index ecdfa897aa9ff8a1a364c2fb29e7d5ab5c64786a..cff2bb2484309200a3ff777665e1c5b6dbb90979 100644 (file)
--- a/ginac/inifcns.h
+++ b/ginac/inifcns.h
@@ -1,8 +1,9 @@
 /** @file inifcns.h
  *
- *  Interface to GiNaC's initially known functions.
- *
- *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *  Interface to GiNaC's initially known functions. */
+
+/*
+ *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -22,6 +23,16 @@
 #ifndef __GINAC_INIFCNS_H__
 #define __GINAC_INIFCNS_H__
 
+#include "function.h"
+#include "ex.h"
+
+#ifndef NO_NAMESPACE_GINAC
+namespace GiNaC {
+#endif // ndef NO_NAMESPACE_GINAC
+
+/** Absolute value. */
+DECLARE_FUNCTION_1P(abs)
+
 /** Sine. */
 DECLARE_FUNCTION_1P(sin)
 
@@ -73,9 +84,36 @@ DECLARE_FUNCTION_1P(Li2)
 /** Trilogarithm. */
 DECLARE_FUNCTION_1P(Li3)
 
-/** Gamma function. */
-DECLARE_FUNCTION_1P(gamma)
+// overloading at work: we cannot use the macros
+/** Riemann's Zeta-function. */
+extern const unsigned function_index_zeta1;
+inline function zeta(const ex & p1) {
+    return function(function_index_zeta1, p1);
+}
+/** Derivatives of Riemann's Zeta-function. */
+extern const unsigned function_index_zeta2;
+inline function zeta(const ex & p1, const ex & p2) {
+    return function(function_index_zeta2, p1, p2);
+}
 
+/** Gamma-function. */
+DECLARE_FUNCTION_1P(Gamma)
+
+/** Beta-function. */
+DECLARE_FUNCTION_2P(Beta)
+
+// overloading at work: we cannot use the macros
+/** Psi-function (aka digamma-function). */
+extern const unsigned function_index_psi1;
+inline function psi(const ex & p1) {
+    return function(function_index_psi1, p1);
+}
+/** Derivatives of Psi-function (aka polygamma-functions). */
+extern const unsigned function_index_psi2;
+inline function psi(const ex & p1, const ex & p2) {
+    return function(function_index_psi2, p1, p2);
+}
+    
 /** Factorial function. */
 DECLARE_FUNCTION_1P(factorial)
 
@@ -85,13 +123,20 @@ DECLARE_FUNCTION_2P(binomial)
 /** Order term function (for truncated power series). */
 DECLARE_FUNCTION_1P(Order)
 
-ex lsolve(ex eqns,ex symbols);
+/** Inert partial differentiation operator. */
+DECLARE_FUNCTION_2P(Derivative)
+
+ex lsolve(const ex &eqns, const ex &symbols);
 
-ex ncpower(ex basis, unsigned exponent);
+ex ncpower(const ex &basis, unsigned exponent);
 
-inline bool is_order_function(ex const & e)
+inline bool is_order_function(const ex & e)
 {
-       return is_ex_the_function(e, Order);
+    return is_ex_the_function(e, Order);
 }
 
+#ifndef NO_NAMESPACE_GINAC
+} // namespace GiNaC
+#endif // ndef NO_NAMESPACE_GINAC
+
 #endif // ndef __GINAC_INIFCNS_H__