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Simple graded commutative algebras
Sophie Morier-Genoud1, Valentin Ovsienko2

We study the notion of $\Gamma$-graded commutative algebra for an arbitrary abelian group $\Gamma$. The main examples are the Clifford algebras already treated by Albuquerque and Majid. We prove that the Clifford algebras are the only simple finite-dimensional associative graded commutative algebras over $\mathbb{R}$ or $\mathbb{C}$. Our approach also leads to non-associative graded commutative algebras extending the Clifford algebras.
1:  IMJ - Institut de Mathématiques de Jussieu
2:  ICJ - Institut Camille Jordan