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| = Sage 3.1.2 Release Tour = Sage 3.1.2 was released on XXX, 2008. For the official, comprehensive release notes, see the HISTORY.txt file that comes with the release. For the latest changes see sage-3.1.2.txt. == Doctest Coverage Hits 60% == * Mike Hansen wrote doctests for almost all pexpect interfaces, which will ensure greater stability across the board. == Hidden Markov Models == * William Stein wrote Cython bindings for the GHMM C library for computing with Hidden Markov Models, which are a statistical tool that is important in machine learning, natural language processing, bioinformatics, and other areas. GHMM is also now included standard in Sage. == Notebook Bugs == * Many bugs introduced in 3.1.1 were fixed by Mike Hansen and Timothy Clemans. * A new testing procedure was implemented, hopefully preventing regressions like in 3.1.1 in the future. == New Structures for Partition Refinement == Robert Miller * Hypergraphs (i.e. incidence structures) -- this includes simplicial complexes and block designs * Matrices -- the automorphism group of a matrix is the set of column permutations which leave the (unordered) set of rows unchanged == Improved Dense Linear Algebra over GF(2) == * M4RI (http://m4ri.sagemath.org) was updated to the newest upstream release which * provides much improved performance for multiplication, * provides improved performance for elimination, * contains several build and bugfixes. * hashs and matrix pickling was much improved * dense matrices over $\mathbb{F}_2$ can now be written to/read from 1-bit PNG images == New PolyBoRi Version (0.5) and Improved Interface == * PolyBoRi was upgraded from 0.3 to 0.5rc * {{{mq.SR}}} now returns PolyBoRi equation systems if asked to * support for boolean polynomial interpolation was added == QEPCAD Interface == == Developer's Handbook == * John H Palmieri rewrote/rearranged large parts of the 'Programming Guide' (now 'Developer's Guide') which should make getting started easier for new developers. == Improved 64-bit OSX Support == == Fast Numerical Integration == == GAP Meataxe Interface == * In the {{{module matrix_group}}}, the method {{{module_composition_factors}}} interfaces with GAP's [http://www.gap-system.org/Manuals/doc/htm/ref/CHAP067.htm Meataxe] implementation. This will return decomposition information for a G-module, for any matrix group G over a finite field. == Better SymPy Integration == == Faster Determinants of Matrices over Multivariate Polynomial Rings == * Martin Albrecht modified Sage to use Singular == Real Number Inputs Improved == |
