%0 Journal Article %T Sur la dynamique p-adique arithm¨¦tique des automorphismes de l'espace affine %A Sandra Marcello %J Mathematics %D 2003 %I arXiv %X We show that the set of periods of an automorphism of the affine plane defined over a $p$-adic field is bounded above by a constant independent from the automorphism. We deduce from this result a new proof in arithmetic dynamics of the Silverman's conjecture in dimension 2. %U http://arxiv.org/abs/math/0310417v2