*4th Odense Winter School on Geometry and Mathematical Physics*

#### Posted by Urs Schreiber

I have just arrived in Denmark, where I am attending the

**4th Odense Winter School on Geometry and Theoretical Physics** (website, program ).

I’ll try to report in the comment section below on what’s going on.

Myself, I’ll be lecturing on *Stacks, differential geometry and action functionals*, following section 1.1 “Motivation” with technical details sprinkled in from section 1.3 “Models and applications” of the *cohesive document*.

I had given similar lectures (with roughly twice the time, though) last weekend in Warsaw, at the

**Polish Seminar on Category Theory and its Applications** (website)

with an accompanying homotopy type theoretic comment in the *Warsaw category theory seminar* on the geometric and the homotopical interval/circle in homotopy type theory (see here for what this is about).

I am trying to use these events to fine-tune the section *1. Introduction* further (not that there is not lots of room to improve it). I am aware of a bunch of deficiencies of the exposition, that I am trying to find the time to fix. But there must be also a bunch of deficiencies that I am not yet aware of. If you tell me about those that bug you, I’d be very grateful. (Many thanks at this point to John Huerta, who has recently given me a list of useful feedback on this.)

## Hélein, “Covariant phase space and multisymplectic geometry”

Frédéric Hélein is speaking about the multisymplectic geometry of covariant phase spaces, following his article.

So far all lectures are presented with slides, and I have little chance of taking notes.

On the other hand, it means that the slides will be made available online, eventually.