3 papers
math.QA2025
2D HQFTs and Frobenius -categories
Paul GroÃkopf
Homotopy Quantum Field Theories as variants of Topological Quantum Field Theories are described by functors from some cobordism category, enriched with homotopical data, to a symme…
math.QA2024
The Hopf category of Frobenius algebras
Paul GroÃkopf, Joost Vercruysse
We show that the universal measuring coalgebras between Frobenius algebras turn the category of Frobenius algebras into a Hopf category (in the sense of Batista-Caenepeel-Vercruyss…
math.MG2024
Intersection the twin dragon with rational lines
Shigeki Akiyama, Paul Grosskopf, Benoît Loridant +1
The Knuth Twin Dragon is a compact subset of the plane with fractal boundary of Hausdorff dimension , . Although the intersection wi…