On High Moments and the Spectral Norm of Large Dilute Wigner Random Matrices

We consider a dilute version of the Wigner ensemble of n-dimensional random matrices H such that each row has in average \rho_n non-zero elements. We study asymptotic properties of the spectral norm of H on the scale n^{-2/3} in the limit when \rho_n is of the order n^{-2/3(1+\epsilon)} with \epsilon >0.