Geodesic
Adams' cobar construction revisited
Documenta mathematica, Tome 27 (2022), pp. 1213-1223

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We give a short and streamlined proof of the following statement recently proven by the author and M. Zeinalian: the cobar construction of the dg coassociative coalgebra of normalized singular chains on a path-connected pointed space is naturally quasi-isomorphic as a dg associative algebra to the singular chains on the based loop space. This extends a classical theorem of F. Adams originally proven for simply connected spaces. Our proof is based on relating the cobar functor to the left adjoint of the homotopy coherent nerve functor.
DOI : 10.4171/dm/895
Classification : 55P35, 57T25, 57T30
Mots-clés : cobar construction, based loop space 
Manuel Rivera. Adams' cobar construction revisited. Documenta mathematica, Tome 27 (2022), pp. 1213-1223. doi: 10.4171/dm/895
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     title = {Adams' cobar construction revisited},
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