This week I am at the conference Groupoids, Graphs and Algebras in Sydney. I gave a talk based on these two blog posts:

• Cofibrations of internal groupoids and localisations by cospans
• Localisation by cospans redux

As well as the preprint

• The elementary construction of formal anafunctors

(which is a sequel to the papers Internal categories, anafunctors and localisations and
On Certain 2-Categories Admitting Localisation by Bicategories of Fractions).

The handwritten notes for my talk are here.