JournalsjncgVol. 6 , No. 2DOI 10.4171/jncg/94

Noncommutative <var>ε</var>-graded connections

  • Axel de Goursac

    Laboratoire de physique théorique d'Orsay
  • Thierry Masson

    Laboratoire de physique theorique d'Orsay
  • Jean-Christophe Wallet

    Laboratoire de physique theorique d'Orsay
Noncommutative  <var>ε</var>-graded connections cover

Abstract

We introduce the new notion of ε-graded associative algebras which takes its roots from the notion of commutation factors introduced in the context of Lie algebras ([39]). We define and study the associated notion of ε-derivation-based differential calculus, which generalizes the derivation-based calculus on associative algebras. A corresponding notion of noncommutative connection is also defined. We illustrate these considerations with various examples of ε-graded commutative algebras, in particular some graded matrix algebras and the Moyal algebra. This last example also permits us to interpret mathematically a noncommutative gauge field theory.