Following SoTFom II, which managed to feature three talks on Homotopy Type Theory, there is now a call for papers announced for SoTFoM III and The Hyperuniverse Programme, to be held in Vienna, ...

At the Topos Institute this summer, a group of folks started talking about thermodynamics and category theory. It probably started because Spencer Breiner and my former student Joe Moeller, both ...

In week241 of This Week’s Finds, you can follow me on my tour of the Laser Interferometry Gravitational-Wave Observatory in Louisiana: Also hear some tales of the dodecahedron… from the pyritohedron ...

This week in our seminar on Cohomology and Computation we continued discussing the bar construction, and drew some pictures of a classic example: Week 26 (May 31) - The bar construction, continued.

When we’ve got a discrete topological group G — or in other words, just a plain old group — we usually call the classifying space of G an Eilenberg–Mac Lane space K (G, 1). This may alternatively be ...

Last summer at the Hausdorff institute in Bonn # we had started working on the following; now it is finally converging to something. Maybe somebody is interested in having a look. Hisham Sati, U. S., ...

Quantization and Cohomology (Week 11) Posted by John Baez In this week’s lecture on Quantization and Cohomology, we’ll start digging deeper into what quantization is really about: Week 11 (Jan. 23) - ...

Nice! (Nit: “Introduction to Synthetic Mathematics” isn’t the title of my chapter, just a blog post excerpted from a first draft of it — not much of which may make it into the final version at all.) ...

Math abstract. We give a generalization of the notion of a Cartan-Ehresmann connection from Lie algebras to L∞ -algebras and use it to study the obstruction theory of lifts through higher String-like ...

The math-blogosphere is abuzz with interest in the new Math Overflow, a mathematics questions and answers site. Already we at the Café have been helped with the answer to a query on the Fourier ...

Update 21 May 2004 I have found out by now that what I was trying to argue here has already been found long ago in papers on background independence of string field theory. For instance on p.2 of ...

Week 1 (Oct. 3) - How the dynamics of p-branes resembles the statics of (p+1)-branes. Cool. That touches upon many things that I have been thinking about lately. Let me propose this general way of ...