Lorenzo Putignano

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math.RT2026

Empty runner removal theorem for Ariki-Koike algebras

Alice Dell'Arciprete, Lorenzo Putignano

For the Iwahori-Hecke algebras of type $A$ , James and Mathas proved a theorem which relates $v$ -decomposition numbers for different values of $e$ , by adding empty runners to the Ja…

math.RT2025

Ribbon blocks for centraliser algebras of symmetric groups

Matthew Fayers, Lorenzo Putignano

Suppose $l, m$ are natural numbers with $l \leq m$ , and $F$ a field of characteristic $p$ , and let $C_{l, m}^{F}$ denote the centraliser of the group algebr…