Sage Days 6 Coding Sprints

Wrap-Up

• Benchmarking (was, malb, wjp)
  • developed a file format for benchmarks
  • wrote code which parses, runs, generates plots for these
  • going to be in the 2.9 release
  • might form the basis for new benchmarking document in the spirit of the constructions document
• Cython Syntax Highlighting (robertwb)
  • visualization to show how good your Cython code is
  • HTML output
• Wrapping g0n (jec)
  • g0n is optional package now
  • first wrapper written
  • memleaks fixed in g0n
• Rewrapping Simon's Ell GP Scripts (robertwb, jec)
  • much simpler now because Simon updated code
• Flint (Bill Hart)
  • many bugs fixed
• Coercion (robertwb, roed, ...)
  • some beta available, other's can start working with it
• Programming Guide

  • see new plan

• FFT Improvements for NTL (dmharvey)
  • much faster on Opterons

  • not so much faster on Core2Duo (~ 20%)

  • available on David's website

  • automatic tuning required, not ready for inclusion

• Sympy & SAGE (Ondrej)

  • mixing SAGE/SymPy expressions
• Debian package of Cython (Ondrej)
  • preliminary package available
• Matrix Permanents (Jaap)
  • hope to achieve 30 - 50% speed-up for permanents
• Gröbner Basis Update (malb)
  • generic implementation for Gröbner bases over any field (slow!!)
  • implementation for Gröbner bases over ZZ (slow!!)
• Doctest Benchmark (wjp)
  • timings of all doctests
  • basic comparison possible eg. 2.8.12 vs. 2.8.13

• PolyBoRi (Michael, Burcin)

  • Python Interface of PolyBoRi reimplemented in Cython

  • new wrapper can run most testcases

  • PolyBoRi release next weekend

Projects

• elliptic curves (John, rpw, was)
  • getting g0n into Sage

  • sparse linear algebra over F_q

  • \#E(F_q)

• multivariate polynomial quotient rings (Burcin, malb, Ludovic, Michael Brickenstein)
  • generic polynomial division/reduction
  • quotient rings via libSINGULAR

  • PolyBoRi integration

  • FGB integration
• coercion model/calculus/programming manual (robertwb, roed, John Hanke, Ondrey, David Loeffler, Jaap)

• packages/updates/LinBox (cpernet, mabshoff)

  • LinBox bugfixes and updates

  • Givaro
  • IML
• benchmarketing (robertwb, Willem)
  • doctest benchmarking interface

Originally Proposed Projects

• (wstein and ondrej certik) determine exactly which sage packages are in debian

• (robertwb, roed, willem, jaap, jon hanke, david loeffler, ondrej) Programming Guide

• (robertwb, roed, willem, jaap, jon hanke, david loeffler, ondrej) Coercion

• (robertwb, roed, willem, jaap, jon hanke, david loeffler, ondrej) Calculus

• (wstein) upgrade the freetype package in sage.
• (wstein) upgrade the cvxopt package to 0.9
• (wstein) Number fields -- Reduction modulo a prime ideal, or any ideal.
• (wstein) Number fields -- optimize K([1,2,3,4,5]), etc., for K number field or order.
• (wstein) Timing of doctests (partially done)
• (wstein) Double question mark for spyx files doesn't work.; docstrings work.
• (wstein) Markup Cython code based on what C code it generates.
• (wstein) R Python expect interface

• (wstein) Redo all the "edwards coord" proofs in Sage instead of Magma.

• (wstein) ATLAS into Sage on Linux.
• (wstein) Linbox -- get rid of all the crappy hacks for minpoly/charpoly use in Sage.
• (wstein) Linbox -- fix wrapping of smith_form problems in Sage.
• (wstein) Create pickle database
• (wstein) Document number fields.

• (wstein) Compute kernels of matrices over \mathbf{Z}/p^n\mathbf{Z}.

• (Ondrej Certik) simplify/improve calculus in SAGE see this link for more info

• (mabshoff) fix BlasMatrix::Hom leak in LinBox

• (mabshoff) start of 2.8.13 release cycle
• (david harvey) try to improve cache efficiency of NTL's FFT routine
• (Bill Allombert) improve PARI ECM implementation
• (john.cremona) adapt interface to new Simon gp scripts
• (john.cremona) elliptic curve isomorphisms, urst transforms of curves and points

• (john.cremona) improved \#E(F_q^d) for elliptic curves defined over F_q

• (malb) speed up GF(p^n) for p \neq 2 and p^n \geq 2^{16} (using NTL::ZZ_pE and NTL::zz_pE)

• (malb) implement quotient rings over multivariate polynomial rings over finite fields using libSINGULAR
• (malb) implement multivariate polynomial rings over number fields using libSINGULAR

• (malb) implement sparse matrices over GF(p^n) (using Givaro) modelled after sparse matrices modint.

• (weinmann) related to malb's point directly above: merge smatlib code into SAGE.
• (weinmann) extend MPolynomialSystemGenerator such that equation systems for (stream and block) ciphers can be generated in a generic way.

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