.RB ( ' )
around the name, as demonstrated for the "unassign" command above.
.PP
+Symbols are considered to be in the complex domain by default, i.e. they are
+treated as if they stand in for complex numbers. This behavior can be changed
+by using the keywords
+.BI real_symbols
+and
+.BI complex_symbols
+and affects all newly created symbols.
+.PP
The following symbols are pre-defined constants that cannot be assigned
a value by the user:
.RS
.BI collect_common_factors( expression )
\- collects common factors from the terms of sums
.br
+.BI conjugate( expression )
+\- complex conjugation
+.br
.BI content( expression ", " symbol )
\- content part of a polynomial
.br
.RE
prints the given
.I expression
-in a way that can be used in a C or C++ program (complex numbers are not
-supported, though).
+in a way that can be used in a C or C++ program.
.PP
The command
.RS
Alexander Frink <Alexander.Frink@uni-mainz.de>
.br
Richard Kreckel <Richard.Kreckel@uni-mainz.de>
+.br
+Jens Vollinga <vollinga@thep.physik.uni-mainz.de>
.SH SEE ALSO
GiNaC Tutorial \- An open framework for symbolic computation within the
C++ programming language
.PP
CLN \- A Class Library for Numbers, Bruno Haible
.SH COPYRIGHT
-Copyright \(co 1999-2003 Johannes Gutenberg Universit\(:at Mainz, Germany
+Copyright \(co 1999-2004 Johannes Gutenberg Universit\(:at 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