Homotopically trivializing the circle in the framed little disks
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actioncircledisksframedlittleoperadappropriateauthor
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This paper confirms the following suggestion of Kontsevich. In the appropriate derived sense, an action of the framed little disks operad and a trivialization of the circle action is the same information as an action of the Deligne-Mumford-Knudsen operad. This improves an earlier result of the author and Bruno Vallette.
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