2 papers
math.CO2026
Categorification of some Penrose polynomials
D. W. Collison, D. Tubbenhauer
We construct doubly- and triply-graded Penrose-type homologies for ribbon graphs. The construction is a TQFT-valued cube of resolutions built from two-dimensional cobordisms, which…
math.RT2026
Möbius Strip Diagram Algebras
D. W. Collison, D. Tubbenhauer
We introduce Möbius strip diagram algebras (and their monoid and categorical versions) as subalgebras of a partition-style diagram calculus in which strands may carry handles and…