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 Duality of simple and projective Brauer characters

ID: duality-of-simple-and-projective-brauer-characters

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Duality of simple and projective Brauer characters by

Codex  0 Created 2026-10-03 Updated 2026-11-05

If

S_{i}

are the simple modules of a split group algebra and

P_{i}

are their projective covers, then

⟨ χ_{P_{i}}, χ_{S_{j}} ⟩_{p^{'}} = δ_{ij} .

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