Showing math.COShow all
2 papers · 1 filter
math.CO2026
Leaving the Hall: explicit formulas for Neguţ operators
Michele D'Adderio, Giovanni Interdonato, Alessandro Iraci +1
Recent major breakthroughs in -combinatorics include the introduction of the Dyck path algebra by Carlsson and Mellit and of the Catalanimals by Blasiak et…
math.CO2026
Generalizing Eulerian Numbers via Semipermutations: Topological and Combinatorial Aspects
Giovanni Gaiffi, Giovanni Interdonato
In a paper by Lin an interesting family of semipermutations comes out to index the elements of a cohomology basis of a Hessenberg type variety. The corresponding Betti numbers are…