documentation update

[ginac.git] / ginac / numeric.h

diff --git a/ginac/numeric.h b/ginac/numeric.h
index 6599ffbc681245004f009aa31ccb35b7f17bb80f..3c7dba2c37aee6b178a978bd5088bed3b104aa7a 100644 (file)
--- a/ginac/numeric.h
+++ b/ginac/numeric.h
@@ -3,7 +3,7 @@
  *  Makes the interface to the underlying bignum package available. */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 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
@@ -85,6 +85,9 @@ public:
        void print(const print_context & c, unsigned level = 0) const;
        unsigned precedence(void) const {return 30;}
        bool info(unsigned inf) const;
+       int degree(const ex & s) const;
+       int ldegree(const ex & s) const;
+       ex coeff(const ex & s, int n = 1) const;
        bool has(const ex &other) const;
        ex eval(int level = 0) const;
        ex evalf(int level = 0) const;
@@ -96,7 +99,7 @@ public:
 protected:
        /** Implementation of ex::diff for a numeric always returns 0.
         *  @see ex::diff */
-       ex derivative(const symbol &s) const { return _ex0(); }
+       ex derivative(const symbol &s) const { return 0; }
        bool is_equal_same_type(const basic &other) const;
        unsigned calchash(void) const;