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Title: Tits alternative for the 3-dimensional tame automorphism group

Abstract: Let k be a field of characteristic 0. The tame automorphism group Tame(k^3) is the group generated by the affine maps of k^33 and the maps of form (x, y, z) → (x, y, z+P(x, y)). We prove the strong Tits alternative for Tame(k^3), using its action on a 2-dimensional

CAT(0) complex. This is joint work with Stéphane Lamy.