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| -rw-r--r-- | sci-mathematics/gfan/metadata.xml | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sci-mathematics/gfan/metadata.xml b/sci-mathematics/gfan/metadata.xml index abc08ece6082..c9e1ddd54b35 100644 --- a/sci-mathematics/gfan/metadata.xml +++ b/sci-mathematics/gfan/metadata.xml @@ -6,6 +6,21 @@ <name>Gentoo Mathematics Project</name> </maintainer> <longdescription lang="en"> - gfan is a computer algebra tool to compute Groebner fans and tropical varieties. + Gfan is a software package for computing Gröbner fans and tropical + varieties. These are polyhedral fans associated to polynomial + ideals. The maximal cones of a Gröbner fan are in bijection with the + marked reduced Gröbner bases of its defining ideal. The software + computes all marked reduced Gröbner bases of an ideal. Their union + is a universal Gröbner basis. The tropical variety of a polynomial + ideal is a certain subcomplex of the Gröbner fan. Gfan contains + algorithms for computing this complex for general ideals and + specialized algorithms for tropical curves, tropical hypersurfaces + and tropical varieties of prime ideals. In addition to the above + core functions the package contains many tools which are useful in + the study of Gröbner bases, initial ideals and tropical + geometry. The full list of commands can be found in Appendix B of + the manual. For ordinary Gröbner basis computations Gfan is not + competitive in speed compared to programs such as CoCoA, Singular + and Macaulay2. </longdescription> </pkgmetadata> |