Hi, > With Mike and Anne we are about to finalize an interface with lrcalc: > > ------------------------------------------------------------------------------ > #10333: An interface to Anders Buch's Littlewood-Richardson Calculator lrcalc > > The "Littlewood-Richardson Calculator" is a C library for fast > computation of Littlewood-Richardson (LR) coefficients and products of > Schubert polynomials. It handles single LR coefficients, products of > and coproducts of Schur functions, skew Schur functions, and fusion > products. All of the above are achieved by counting LR (skew)-tableaux > of appropriate shape and content by iterating through > them. Additionally, lrcalc handles products of Schubert polynomials. > > The web page of lrcalc is: http://math.rutgers.edu/~asbuch/lrcalc/ > ------------------------------------------------------------------------------
> lrcalc weights 500Ko (100Ko of C code + administrative files + > mercurial repo). It's GLPV2+ with no dependencies. The code is quite > clean and so far proved to be portable: we used it in MuPAD-Combinat, > under MacOS, various flavors of Linux, and CYGWIN; tests on solaris > are welcome! One more argument for using it. Having it in standard Sage is a good step toward getting rid of Symmetrica which often causes problems and is no more maintained. > lrcalc will progressively become a key low-level component for Sage's > symmetric functions library. This evolution will be simpler if lrcalc > is always available. > > I therefore would like to cast a vote. Should lrcalc become: Therefore: > [X] A standard spkg > [ ] An optional spkg Cheers, Florent -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
