The Wedderburn-projective formulation of the Idempotent Nakayama Conjecture

From papers

Let BB be a Noetherian algebra, and let NN be a Wedderburn projective BB-module. Write τN(B)\tau_N(B) for the trace of NN in BB. Wedderburn-projective Idempotent Nakayama Conjecture. If

ExtBi(B/τN(B),B)=0for i0,\operatorname{Ext}^{i}_{B}(B/\tau_N(B),B)=0\quad\text{for $i\ge 0$},

then NN is a generator. The source states that this formulation is equivalent to the Idempotent Nakayama Conjecture and notes that it appears weaker than the Strong Nakayama Conjecture because over many rings a Wedderburn projective module is automatically a generator.

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Sources & referencesView supporting material

Primary source

Ragnar-Olaf Buchweitz, “Morita Contexts, Idempotents, and Hochschild Cohomology - with Applications to Invariant Rings -”, arXiv:math/0301347 (2003).

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