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Lecture 4
Open problems about the graph complex and Poisson bracket symmetries: the combinatorics of cocycles and Poisson non-triviality of the Kontsevich flows.
* Deformation quantization: the noncommutative associative star-product, its associator, the factorization problem.
* The action of graph complex on the space of Kontsevich's star-products.
Maxim Kontsevich