Sage 3.3 Release Tour

Sage 3.3 was released on FIXME. For the official, comprehensive release notes, see sage-3.3.txt. In general terms, the following points are some of the foci of this release:

• Clean up various doctest failures from 3.2.3
• Fix some build issues from 3.2.3 on the new set of supported images
• Merge small to medium sized patches ready to go in

• Switch to eMPIRe as an implementation of multi-precision integers and rationals

• Switch to ecl for a Common Lisp implementation

• Update Python to 2.5.4

• Update Pari to 2.3.4svn

• Switch to FLINT for univariate polynomial arithmetic over Z/nZ

Here's a summary of features in this release, categorized under various headings.

Algebra

• Transitivity for permutation groups (William Stein) -- In the permutation group module permgroup.py, the query function is_transitive() returns whether or not the group is transitive on [1..G.degree()]. A few surrounding docstrings are fixed and doctest coverage for the file sage/groups/perm_gps/permgroup.py is now 100%.

Algebraic Geometry

• Improved precision and performance when calculating analytic rank (William Stein) -- When calculating the analytic rank of an elliptic curve, the default is to use Cremona's gp script, where the precision is automatically doubled until it doesn't fail. The precision is started at 16 rather than the previous default precision. The computation is now about 3 times faster usually by starting off using this smaller precision.

Basic Arithmetic

• ivalue field in integer_mod.pyx is no longer public (Craig Citro) -- The ivalue field for IntegerMod_int is no longer public. This gives about a 1.5 to 2X speedup when multiplying IntegerMod_ints.

• Some fixes for is_perfect_power and bessel_J(0,0) (Craig Citro, Rob Bradshaw, Robert Miller) -- A temporary work around for an upstream bug in GMP when using is_perfect_power(). Resolved a Pari interface bug when using bessel_J(0,0).

• Improved performance for generic polynomial rings, and for univariate polynomial arithmetic over Z/nZ[x] (Yann Laigle-Chapuy, Martin Albrecht) -- Improved performance when performing modulo arithmetic between elements of a generic polynomial ring. Univariate polynomial arithmetic over Z/nZ[x] now has considerable speed-up at approximately 20x.

Build

• 64-bit OSX (Michael Abshoff) -- Fixed 64-bit OSX build support for f2c, added 64-bit OSX build support for tachyon, added 64-bit OSX build support for flintqs, and added persistent Sage 64-bit building switch on OSX and Solaris.

Calculus

• LaTeX output (Mike Hansen) -- Added LaTeX output for ceiling, floor, and derivative functions, and LaTaX'ing of powers of negative numbers.

• Make bernoulli_polynomial independent of Maxima (Craig Citro) -- A rewrite of bernoulli_polynomial to avoid using Maxima completely in computing Bernoulli polynomials. This gives roughly a factor of 10 speedup.

Coding Theory

Coercion

Combinatorics

Commutative Algebra

Distribution

Doctest

Documentation

Geometry

Graph Theory

Graphics

Group Theory

Interact

Interfaces

Linear Algebra

Memory Leak

Miscellaneous

Modular Forms

Notebook

Number Theory

Numerical

Optional Packages

Packages

Porting

Solaris

User Interface

Website/Wiki