Source history
Original source: arXiv:2107.09590v1
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The permanent identity and original source provenance are retained below.
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"kind": "Lemma",
"number": "3.15",
"title": "Lemma 3.15. If Sb ⊃Sa, then Rb ,→Ra is a graded Frobenius extension of rank |Sb/Sa|. To",
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