Emily Roff

The Categorical Late Lunch is Edinburgh's informal category theory seminar.

The seminar is intended to be pretty low-key—a place where, for instance, PhD students feel comfortable giving an introduction to some standard categorical topic. It's not intended to be an ordinary seminar where the norm is to describe your latest cutting-edge work (though that's not forbidden!).

We have a mixed group of participants, ranging in focus from derived algebraic geometry to theoretical computer science, so talks should be accessible to anyone who knows some basic category theory. The aim is to create an informal environment, where interaction during the talks is encouraged.

In Autumn 2021 the CLL will run as a hybrid seminar, at ICMS and via Zoom. To keep things relaxed, this is for UoE and friends, and not publicly accessible. For more details, or to propose a topic, email Emily or Ruben.

Autumn 2021

13.10.2021 Chris Heunen 'Axioms for the category of Hilbert spaces' Slides
27.10.2021 Nuiok Dicaire
Emily Roff
Jesse Sigal
Ruben Van Belle
'Modularity and monads'
'Return of the alley cats: 10 minutes of magnitude'
'Strict monoidal categories are monoids in what category?'
'Categorical probability theory'
10.11.2021 Jenny Brown 'Skeins and clusters'
24.11.2021 Patrick Kinnear 'Morita categories' Slides
08.12.2021 Simona Paoli 'Higher categories in dimension two: some old and new perspectives'

Summer 2021

28.07.2021 Jade Master 'The universal property of the algebraic path problem' Partial notes
04.08.2021 Ruben Van Belle 'Probability monads as codensity monads' Slides
11.08.2021 Emily Roff 'What is a hole in a locally metric category?' Slides
18.08.2021 Callum Reader 'Scalars and traces in bicategories' Slides
25.08.2021 Nuiok Dicaire 'Localisable monads' Slides

Winter/Spring 2021

20.01.2021 Tom Leinster 'Isbell conjugacy' Whiteboard
03.02.2021 Chris Heunen 'Sheaf representation of monoidal categories' Slides
03.03.2021 Robin Kaarsgaard 'Graph traversals as universal constructions' Slides
10.03.2021 Clark Barwick 'A motivated introduction to ∞-categories: Part 1' Blackboard
17.03.2021 Clark Barwick 'A motivated introduction to ∞-categories: Part 2'
31.03.2021 Nuiok Dicaire 'Monads, graded monads, and computational effects' Slides

Autumn 2020

01.10.2020 Tom Leinster 'The surprising power of free categories' Whiteboard
15.10.2020 Jean-Simon Lemay 'Hopf monads and trace monads' Whiteboard
29.10.2020 Graham Manuell 'A 2-categorical bifunctor theorem' Slides
12.11.2020 Ruben Van Belle 'Lax algebras and topology' Slides
26.11.2020 Carlos Zapata-Carratala 'Ternary structures: generalising associativity and categories' Blackboard
10.12.2020 Pablo Andres-Martinez 'Feedback loops without coproducts: Haghverdi's Unique Decomposition Categories' Whiteboard