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arXiv · 2506.12973

Intersections of blocks of cyclotomic Hecke algebras

Maria Chlouveraki·Gunter Malle
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Abstract

Trinh and Xue have proposed a startling conjecture on intersections of blocks of cyclotomic Hecke algebras occurring in modular representation theory of finite reductive groups. We prove this conjecture for all exceptional type groups apart from $E_8$. We also propose several generalisations, to Suzuki and Ree groups, to non-rational Coxeter groups and even more generally to spetsial complex reflection groups, and confirm these in various cases.

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Maria Chlouveraki, Gunter Malle. 2025-06-15. Intersections of blocks of cyclotomic Hecke algebras. https://doi.org/10.1007/s00209-026-03986-w

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