- 94-36 Flato M., Sternheimer D.
- Closedness of star products and cohomologies
(52K, plain TeX)
Feb 25, 94
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Abstract. We first review the introduction of star products in connection with
deformations of Poisson brackets and the various cohomologies that are
related to them. Then we concentrate on what we have called ``closed
star products" and their relations with cyclic cohomology and index
theorems. Finally we shall explain how quantum groups, especially in
their recent topological form, are in essence examples of star products.