proof app:A-long-proofs@proof-254

open in the book · appendices/A-long-proofs.tex:20727

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proof : app:A-long-proofs@proof-254prooftheorem A.422: The Virasoro extensionA.422definition A.421: Witt algebraA.421definition 14.75: The classifying group14.75proposition 14.76: H^2 classifies the central extensions14.76

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proves The Virasoro extension declared appendices/A-long-proofs.tex:20727