Well, there are a few examples included with the package wedge-0.1.0.tar.gz (subdirectory examples). Also, you can have a look at the test programs (subdirectory test). Any feedback is of course welcome, although the right place to discuss Wedge is probably the forum at sourceforge.net rather than this list. Diego Conti
Correct, this is very interesting, can you ship an example of the usage so I can get a better feel for how this might contribute to my work.
Thanks
Alex Baker
On 21/12/2007, Diego Conti <diego.conti@unimib.it> wrote:
Hi, I have been working on an extension to GiNaC for differential geometry, and I have released a first version, available from <https://sourceforge.net/projects/libwedge/>.
Current features include: - Vector spaces: determine a basis from a list of generators, and similar computations. - Manifolds and differential forms: exterior derivative; wedge product. - Lie groups: the general linear group; subgroups determined by the choice of a subalgebra; abstract Lie groups defined in abbreviated form, e.g. writing (0,0,12) for the Heisenberg group, characterized by the existence of a basis of left-invariant one-forms e1,e2,e3 such that de3=e1 ^ e2 and e1,e2 are closed. - Riemannian metrics and G-structures, defined on a Lie group or a coordinate patch of a generic manifold, and represented by an orthonormal basis of 1-forms (adapted frame); spinors, Clifford multiplication. - Connections: the Levi-Civita connection; curvature; covariant derivatives; define connections on generic manifolds and impose conditions on the Christoffel symbols, e.g. to obtain curvature conditions.
I thought maybe someone in this list would be interested. Diego Conti _______________________________________________ GiNaC-list mailing list GiNaC-list@ginac.de https://www.cebix.net/mailman/listinfo/ginac-list