Marche aléatoire sur le semi-groupe des contractions de . Cas de la marche aléatoire sur avec choc élastique en zéro
The invariant measures for a Markovian operator corresponding to a random walk, in a random stationary one-dimensional environment defined by a dynamical system, are quasi-invariant measures for the system. We discuss the construction of such measures in the general case and show unicity, under some assumptions, for a rotation on the circle.