This is a tutorial that documents GiNaC @value{VERSION}, an open
framework for symbolic computation within the C++ programming language.
-Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
+Copyright (C) 1999-2016 Johannes Gutenberg University Mainz, Germany
Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
@page
@vskip 0pt plus 1filll
-Copyright @copyright{} 1999-2015 Johannes Gutenberg University Mainz, Germany
+Copyright @copyright{} 1999-2016 Johannes Gutenberg University Mainz, Germany
@sp 2
Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
@section License
The GiNaC framework for symbolic computation within the C++ programming
-language is Copyright @copyright{} 1999-2015 Johannes Gutenberg
+language is Copyright @copyright{} 1999-2016 Johannes Gutenberg
University Mainz, Germany.
This program is free software; you can redistribute it and/or
something very close to @code{dirac_gamma(mu)}, although
@code{dirac_gamma} have more efficient simplification mechanism.
@cindex @code{get_metric()}
+Also, the object created by @code{clifford_unit(mu, minkmetric())} is
+not aware about the symmetry of its metric, see the start of the pevious
+paragraph. A more accurate analog of 'dirac_gamma(mu)' should be
+specifies as follows:
+
+@example
+ clifford_unit(mu, indexed(minkmetric(),sy_symm(),varidx(symbol("i"),4),varidx(symbol("j"),4)));
+@end example
+
The method @code{clifford::get_metric()} returns a metric defining this
Clifford number.
To evaluate them using floating-point arithmetic you need to call
@example
-ex ex::evalf(int level = 0) const;
+ex ex::evalf() const;
@end example
@cindex @code{Digits}
@example
bool info(unsigned inf) const override;
-ex evalf(int level = 0) const override;
+ex evalf() const override;
ex series(const relational & r, int order, unsigned options = 0) const override;
ex derivative(const symbol & s) const override;
@end example