Formes linéaires en polyzêtas et intégrales multiples

The problem we consider is to define families of n-dimensional integrals, endowed with group actions as in Rhin-Viola's work on irrationality measures of $ζ(2)$ and $ζ(3)$, the values of which are linear forms, over the rationals, in multiple zeta values of weight at most n. We generalize Vasilyev's and Sorokin's approaches, and give a change of variables that connects them to each other. We describe a group structure for a n-dimensional integral that specializes, for n=2 and n=3, to the ones obtained by Rhin and Viola.

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