Dear All, Here is a minor patch to clifford.cpp. Besides a typo in lst_to_clifford() it makes clifford_moebius_map() behaviour more intelligent. This function accepts both lst and matrix as input argument v but returned always a lst. Now it returns an object of the same class as it get in. This is reflected in the tutorial as well. Best wishes, Vladimir -- Vladimir V. Kisil email: kisilv@maths.leeds.ac.uk -- www: http://maths.leeds.ac.uk/~kisilv/ /home/amsta/kisilv/GiNaC Index: debian/changelog =================================================================== RCS file: /home/cvs/GiNaC/debian/changelog,v retrieving revision 1.36 diff -u -r1.36 changelog --- debian/changelog 20 Apr 2006 22:59:39 -0000 1.36 +++ debian/changelog 28 Apr 2006 11:52:14 -0000 @@ -3,7 +3,7 @@ * New upstream release; binary incompatible, so it's libginac1.4 now. * debian/*: Streamlining by Peter Eisentraut <petere@debian.org>. - -- Richard Kreckel <kreckel@ginac.de> <DATE> + -- Richard Kreckel <kreckel@ginac.de> Mon, 17 Apr 2006 22:25:48 +0200 ginac (1.3.4-1) unstable; urgency=low Index: doc/tutorial/ginac.texi =================================================================== RCS file: /home/cvs/GiNaC/doc/tutorial/ginac.texi,v retrieving revision 1.185 diff -u -r1.185 ginac.texi --- doc/tutorial/ginac.texi 22 Apr 2006 15:42:57 -0000 1.185 +++ doc/tutorial/ginac.texi 28 Apr 2006 11:52:15 -0000 @@ -3545,9 +3545,10 @@ the matrix @samp{M = [[a, b], [c, d]]}. The parameter @code{G} defines the metric of the surrounding (pseudo-)Euclidean space. This can be an indexed object, tensormetric, matrix or a Clifford unit, in the later -case the optional parameters @code{rl} and @code{anticommuting} are ignored -even if supplied. The returned value of this function is a list of -components of the resulting vector. +case the optional parameters @code{rl} and @code{anticommuting} are +ignored even if supplied. Depending from the type of @code{v} the +returned value of this function is either a vector or a list holding vector's +components. @cindex @code{clifford_max_label()} Finally the function Index: ginac/clifford.cpp =================================================================== RCS file: /home/cvs/GiNaC/ginac/clifford.cpp,v retrieving revision 1.95 diff -u -r1.95 clifford.cpp --- ginac/clifford.cpp 22 Feb 2006 14:52:07 -0000 1.95 +++ ginac/clifford.cpp 28 Apr 2006 11:52:15 -0000 @@ -1227,7 +1227,7 @@ else throw(std::invalid_argument("lst_to_clifford(): dimensions of vector and clifford unit mismatch")); } else - throw(std::invalid_argument("lst_to_clifford(): first argument should be a vector vector")); + throw(std::invalid_argument("lst_to_clifford(): first argument should be a vector (nx1 or 1xn matrix)")); } else if (is_a<lst>(v)) { if (dim == ex_to<lst>(v).nops()) return indexed(matrix(dim, 1, ex_to<lst>(v)), ex_to<varidx>(mu).toggle_variance()) * e; @@ -1352,8 +1352,8 @@ } x = lst_to_clifford(v, cu); - ex e = simplify_indexed(canonicalize_clifford((a * x + b) * clifford_inverse(c * x + d))); - return clifford_to_lst(e, cu, false); + ex e = clifford_to_lst(simplify_indexed(canonicalize_clifford((a * x + b) * clifford_inverse(c * x + d))), cu, false); + return (is_a<matrix>(v) ? matrix(ex_to<matrix>(v).rows(), ex_to<matrix>(v).cols(), ex_to<lst>(e)) : e); } ex clifford_moebius_map(const ex & M, const ex & v, const ex & G, unsigned char rl, bool anticommuting)