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Connecting Models Of Configuration Spaces: From Double Loops To Strings, Jason M. Lucas
Connecting Models Of Configuration Spaces: From Double Loops To Strings, Jason M. Lucas
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Foundational to the subject of operad theory is the notion of an En operad, that is, an operad that is quasi-isomorphic to the operad of little n-cubes Cn. They are central to the study of iterated loop spaces, and the specific case of n = 2 is key in the solution of the Deligne Conjecture. In this paper we examine the connection between two E 2 operads, namely the little 2-cubes operad C 2 itself and the operad of spineless cacti. To this end, we construct a new suboperad of C2, which we name the operad of tethered …