Title: Regularization by noise in (2x 2) hyperbolic systems of conservation law,
Abstract: In this paper we study a non strictly systems of conservation law by
stochastic perturbation. We show the existence and uniqueness of the solution.
We do not assume that $BV$-regularity for the initial conditions. The proofs
are based on the concept of entropy solution and in the characteristics method
(in the influence of noise). This is the first result on the regularization by
noise in hyperbolic systems of conservation law.