Schurian-finiteness conjecture for integral type B Hecke algebra blocks

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Let ee be the quantum characteristic, let \hhh\hhh be an integral type B Hecke algebra, and let BB be a block of \hhh\hhh with defect at least 22. Schurian-finiteness conjecture. If e≥4e\geq 4, then BB is Schurian-infinite in any characteristic. In particular, BB is Schurian-finite if and only if it has finite representation type.

The conjecture concerns the classification of Schurian-finite blocks for integral Hecke algebras. The paper proves the assertion except for certain blocks of defects 33 and 44, so the conjecture remains open in those cases.

References

Primary source

Susumu Ariki, Sinéad Lyle, Liron Speyer and Qi Wang, “Schurian-finiteness of blocks of type B Hecke algebras”, arXiv:2512.18877 (2025).

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