WILLIAM: I'm going to migrate this project to github, since everybody working on it prefers git anyways: https://github.com/williamstein/psage

The target audience of PSAGE is research mathematicians, with an emphasis on arithmetic geometry. PSAGE is closely related to Sage.

See the page for help on getting started.

The psage Python library includes bits and pieces of new-ish code relevant to the following problems:

• Computing p-adic L-series of some modular abelian varieties of dimension > 1 (Jen Balakrishnan and William Stein)
• Computing Hilbert modular forms over Q(sqrt(5)) (William Stein and Aly Deines).
• Maass forms (from Fredrick Stromberg)
• Siegel modular forms (from Skorupa, Nathan Ryan, etc.)
• Computation of images of elliptic curve Galois representations (Drew Sutherland)
• Computation of L-series of elliptic curves over functions fields (Sal Baig and Chris Hall)
• Modular forms fourier expansion framework (Martin Raum, a student of Zagier)