Third Mac Lane cohomology via categorical rings
classification
🧮 math.KT
keywords
bimodulecategoricalcohomologylaneringringsthirdautomorphisms
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It is proved that the third Mac Lane cohomology group of a ring R with coefficients in a bimodule B classifies categorical rings having R as the ring of isomorphism classes of objects and B as the bimodule of automorphisms of the neutral object.
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