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Announcements:

July 11, 2011:
Geordie Williamson (Oxford) will give two introductory lectures this week on Tuesday and Thursday about the affine Grassmannian and its applications.

2:00pm, Room 520.

June 18, 2011:
Tuesday June 21, Pedro Vaz will speak about a categorified q-Schur algebra and coloured HOMFLYPT link homology.

2:30pm, Room 507.

June 16, 2011:
Tuesday July 5 through Friday July 8, Anton Zeitlin (Yale) will give a series of introductory lectures on vertex operator algebras.

Room 507 (Tu, Th), 622 (Fri), TBA (Wed), 1:30-2:45pm.

Sep 14, 2009:
Added computer programs link to navigation bar.

July 15, 2009:
On Friday July 17, Joshua Sussan (UC Berkeley) will speak about "Highest weight categories and link homology."

1pm, Room TBA.

Computer Programs

Below are links to some computational programs written by people at columbia.

Odd code. Some Python code useful for working in the algebra of odd symmetric functions, written by Alexander Ellis.

HFK. A program to compute Heegaard Floer knot homology by John Baldwin and Danny Gillam (PhD's '08).

Calculator for knot Floer homology of (p,pn+1)-cables of thin knots (plain text, Mathematica notebook, 373K bytes) by Ina Petkova.  Also see her associated article Cables of thin knots and bordered Heegaard Floer homology.

dCalc. (compressed file dCalc.tar.gz, 14K bytes) A program to compute Heegaard Floer homology d invariants of \pm1 surgeries on knots written by Thomas Peters (PhD '10).

a-infinity.nb. (plain text, Mathematica notebook, 412K bytes) A mathematica package for performing computations of bordered Floer homology with torus boundary. Written by Adam Levine (PhD '10).

Homology.sage. (plain text, sage worksheet, 4.72K bytes) A sage worksheet for computations with Z/2 chain complexes. Written by Jin Woo Jang, Rachel Vishnepolsky, and Xuran Wang, during the summer 2009 REU.

FukayaAlg.sage. (plain text, sage worksheet, 11.24K bytes) A sage worksheet for computing the Hochschild homology of an undirected Fukaya algebra. Written by Jin Woo Jang, Rachel Vishnepolsky, and Xuran Wang, during the summer 2009 REU.