XV Portuguese Category Seminar

Aveiro, 11th – 12th September, 2025

Thursday 11

10:00–11:00 The question was asked by Ronald Brown (slides)
Tim Van der Linden
11:00–11:30Coffee Break
11:30–12:00(Weakly) protomodular objects in unital categories (slides)
Diana Rodelo
12:00–12:30The Lawvere condition and a classification theorem for Malt'sev-like categories (slides)
Nelson Martins-Ferreira
12:30–14:15Lunch Break
14:15–14:45When is the composition of normal monomorphisms stable?
Corentin Vienne
14:45–15:15Pushforward and ternary semidirect product in semi-abelian categories (slides)
Arnaud Duvieusart
15:15–15:45From fuzzy Markov categories towards imprecise probability (slides)
Nico Wittrock
15:45–16:15Coffee Break
16:15–17:15Regularity and complete distributivity in fuzzy metric spaces and formal contexts (slides)
Adriana Balan

Friday 12

10:00–11:00Galois theory of differential and difference schemes (slides)
Ivan Tomašić
11:00–11:30Coffee Break
11:30–12:00A graphical calculus for linear categories (slides)
Norihiro Yamada
12:00–12:30Indexed monoidal structures and regular double hyperdoctrines (slides)
José Siqueira
12:30–14:15Lunch
14:15–14:45Free monoids and Riguet congruences (slides)
Raúl Ruiz Mora
14:45–15:15Simplicial resolutions in model categories and a perspective toward multisimplicial constructions in higher categories (slides)
Fatima Maayane
15:15–15:45Colimits and monotone-light factorizations
João J. Xarez
15:45–16:15Coffee Break
16:15–17:15Induction for affine type A Soergel bimodules (slides)
Marco Arien Mackaaij