n-ary associative algebras, cohomology, free algebras and coalgebras

Details n-ary associative algebras, cohomology, free algebras and coalgebras n-ary associative algebras, cohomology, free algebras and coalgebras

2008-03-04

arxiv.org/abs/0803.0553v2

Mathematics

Rings and Algebras

23 pages

Scientific paper

When $n$ is odd, a cohomology of type Hochschild for $n$-ary partially associative algebras has been defined in Gnedbaye's thesis. Unfortunately, the cohomology definition is not valid when $n$ is even. This fact is found again in the computations of the $n$-ary partially associative free algebra. In this work, we define in a first time two approachs of an Hochschild cohomology for $n$-ary partially associative algebras. First by reducing the space of cochains, secondly by using a graded version. Next we compute the free $n$-ary algebra, giving a basis of this algebra. At last we extend the notion of coalgebras to $n$-ary algebras.

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