= coxeter3 = == Description == This package wraps Fokko Ducloux's Coxeter 3 C++ library Features: - General Coxeter groups, implemented through the combinatorics of reduced words; - Reduced expression and normal form computations; - Bruhat ordering; - Ordinary Kazhdan-Lusztig polynomials; - Kazhdan-Lusztig polynomials with unequal parameters; - Inverse Kazhdan-Lusztig polynomials; - Cells and W-graphs; http://math.univ-lyon1.fr/~ducloux/coxeter/coxeter3/english/coxeter3_e.html == License == GPL == SPKG Maintainers == * Mike Hansen == Upstream Contact == None; alas, Fokko Ducloux passed away in 2006. http://math.univ-lyon1.fr/~ducloux/du_Cloux.html == Dependencies == None == Special Update/Build Instructions == Upstream is unlikely to change, unless someone takes over the development of Coxeter3. In any cases, the application of the following patches is automatically handled by spkg-install: - directories.h.patch: update coxeter3 directory information to fetch its data and messages from the Sage installation tree - makefile.patch: handle compilation flags for Darwin and Cygwin - sage.cpp: add a function for Bruhat invervals which is simpler to code in C++ than Cython == Changelog == === coxeter3-1.1 (Mike Hansen 2009-2013 + some fixes by Nicolas M. ThiƩry and Jean-Pierre Flori) === * Initial release. See Sage trac #12912