The Yoneda algebra of a graded Ore extension
classification
🧮 math.RA
keywords
algebraextensiongradedyonedacassidyconnected-gradedconversemodule
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Let A be a connected-graded algebra with trivial module k, and let B be a graded Ore extension of A. We relate the structure of the Yoneda algebra E(A) := Ext_A(k,k) to E(B). Cassidy and Shelton have shown that when A satisfies their K_2 property, B will also be K_2. We prove the converse of this result.
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