Tout idempotent e d'une algèbre (associative unitaire) T définit une algèbre , d'unité e. Nous montrons que la comparaison des cohomologies de Hochschild et se fait par un morphisme d'algèbres de Gerstenhaber qui, de surcroît, se factorise par les algèbres de cohomologie de différentes algèbres triangulaires.
Any idempotent element e of an (associative) algebra T defines an algebra with unit e. We show that the morphism which compares their Hochschild cohomology algebras is a Gerstenhaber algebras morphism. Moreover, this morphism factorizes through the cohomological algebras of many triangular algebras.
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@article{CRMATH_2006__342_6_371_0, author = {Bendiffalah, Belkacem and Guin, Daniel}, title = {Idempotent et cohomologie de {Hochschild}}, journal = {Comptes Rendus. Math\'ematique}, pages = {371--376}, publisher = {Elsevier}, volume = {342}, number = {6}, year = {2006}, doi = {10.1016/j.crma.2006.01.003}, language = {fr}, url = {http://www.numdam.org/articles/10.1016/j.crma.2006.01.003/} }
TY - JOUR AU - Bendiffalah, Belkacem AU - Guin, Daniel TI - Idempotent et cohomologie de Hochschild JO - Comptes Rendus. Mathématique PY - 2006 SP - 371 EP - 376 VL - 342 IS - 6 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2006.01.003/ DO - 10.1016/j.crma.2006.01.003 LA - fr ID - CRMATH_2006__342_6_371_0 ER -
%0 Journal Article %A Bendiffalah, Belkacem %A Guin, Daniel %T Idempotent et cohomologie de Hochschild %J Comptes Rendus. Mathématique %D 2006 %P 371-376 %V 342 %N 6 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2006.01.003/ %R 10.1016/j.crma.2006.01.003 %G fr %F CRMATH_2006__342_6_371_0
Bendiffalah, Belkacem; Guin, Daniel. Idempotent et cohomologie de Hochschild. Comptes Rendus. Mathématique, Tome 342 (2006) no. 6, pp. 371-376. doi : 10.1016/j.crma.2006.01.003. http://www.numdam.org/articles/10.1016/j.crma.2006.01.003/
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