Sage Days 91: Open Source Computation and Algebraic Surfaces (Sept. 29 - Oct. 1, 2017)

Location: Banff International Research Station.

Schedule

Feel free to add suggestions

Please add "sd91" as a keyword to any tickets you are working on during this week so they show up in this list: sd91 Tickets

Lattice related projects

fix vector matrix multiplication for free module elements #23576
fix .annihilator() for the trivial abelian group #22720
fix intersections of free_quadratic_modules and thus homomorphisms of abelian groups #23703
implement finite bilinear/quadratic forms and make sure that the discriminant group has one #23699
implement QQ/ZZ , QQ/2ZZ or QQ/nZZ as abelian groups. This is where finite quadratic/bilinear forms have values
implement a class for (subgroups of) the orthogonal group of a finite bilinear/quadratic form and an algorithm to compute it
diagonalization and isomorphism testing for finite quadratic/bilinear forms
create a genus from a signature pair and a finite quadratic form
create a finite quadratic form from a genus
a latex representation for the genus using the Conway Sloane genus symbols
a base class for the orthogonal group of a lattice
a method to compute the orthogonal group of a positive definite lattice

Point counting and zeta function projects

hypergeometric motives #23671
get Edgar Costa's code for zeta functions of projective hypersurfaces into Sage #23863

Before the workshop, we recommend downloading and installing the latest version of the source code of Sage, opening a Sage trac account.