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6
votes
1
answer
310
views
Operad structure on Kontsevich's admissible graphs
In his celebrated 97' preprint q-alg/9709040, M. Kontsevich constructs a $L_\infty$-quasi-isomorphism $\mathcal U:\mathcal D_{\rm poly}\to\mathcal T_{\rm poly}$ between the differential graded algebra …
5
votes
0
answers
277
views
Higher Braces algebra and operads
1) In [HIGHER OPERATIONS ON HOCHSCHILD COMPLEX], Gerstenhaber and Voronov showed that the Hochschild complex $C_1(\mathcal A)$ of any associative algebra (or e_1 algebra) $\mathcal A$ is naturally end …
3
votes
0
answers
175
views
Generalisation of the notion of operad
An algebra (of the type encoded by $\mathscr P$) on the vector space $V$ is a morphism of operads $\mu:\mathscr P\to End_V$ with $End_V$ the endomorphism operad for $V$. … In other words, (if such generalisation of operads exists), the pair $(\rho,[\cdot,\cdot])$ would be described as a morphism $\mathscr P\to End_{\big((A,\cdot),(V,*)\big)}$ i.e. the right-hand side would …
3
votes
1
answer
241
views
A differential graded Lie algebra with the Hochschild differential
Let $(V,\cdot)$ be an associative algebra and $W$ be a vector space endowed with a bimodule structure $\triangleright:V\otimes W\to W$ and $\triangleleft:W\otimes V\to W$ such that the following relat …
8
votes
1
answer
240
views
Classification of formality morphisms for chains and Drinfel'd associators
In his 1997 preprint q-alg/9709040, M. Kontsevich proved constructively the existence of a $L_\infty$-quasi-isomorphism between the differential graded algebra structure on the deformation complex of …
4
votes
1
answer
266
views
3-Gerstenhaber algebra structure on the cohomology of deformation complexes?
In a seminal paper "On the Deformation of Rings and Algebras", M. Gerstenhaber showed that the deformation complex of any associative algebra (known as the Hochschild complex) is naturally endowed wit …
4
votes
1
answer
420
views
Formality of the little $n$-disks operad and deformation theory
In [Another proof of M. Kontsevich formality theorem], Tamarkin provides a proof of the formality of the differential graded Lie algebra controlling the deformation of a polynomial associative algebra …
3
votes
1
answer
359
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Brace algebra structure on the Hochschild complex of an associative algebra
As shown by Gerstenhaber and Voronov [Higher operations on the Hochschild complex], the Hochschild complex of an associative algebra is endowed with a natural structure of brace algebra. The first bra …