Sage 3.1 and 3.1.1 Release Tour

Sage 3.1.1 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-3.1.1.txt.

Graph and Plotting Improvements

Arnaud Bergeron, Jason Grout, Robert Miller, Franco Saliola

• (Robert Miller, Franco Saliola) Automatic plotting of trees and posets.

Major Update to Root Systems

Dan Bump, Nicolas Thiery, Nicolas Borie, Mike Hansen

Steenrod Algebra Calculations

John Palmieri

Notebook improvements

Timothy Clemans

Free Modules Revision

David Kohel

Multimodular Algorithm for Bernoulli Numbers

David Harvey

Partition Refinement

Robert Miller

• Generalized the existing algorithms for graphs and binary codes, rewrote algorithm to be substantially more legible and maintainable.

Integral Point Finding for Elliptic Curves over Q

Tobias Nagel, Michael Mardaus, John Cremona

• Integral pints on elliptic curves over Q: done, in 3.1.1
• S-integral points on elliptic curves over Q: in progress

New sage_input Function

Carl Witty