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arxiv: 1008.3413 · v2 · pith:CXWAAFS5new · submitted 2010-08-19 · 🧮 math.RT

Decomposition matrices for d-Harish-Chandra series: the exceptional rank two cases

classification 🧮 math.RT
keywords decompositionexceptionalmatricesrankalgebrasbasiccalculatecanonical
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We calculate all decomposition matrices of the cyclotomic Hecke algebras of the rank 2 exceptional complex reflection groups in characteristic 0. We prove the existence of canonical basic sets in the sense of Geck-Rouquier and show that all modular irreducible representations can be lifted to the ordinary ones.

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