Positivity of Lyapunov exponents for Anderson-type models on two coupled strings


We study two models of Anderson-type random operators on two deterministically coupled continuous strings. Each model is associated with independent, identically distributed four-by-four symplectic transfer matrices, which describe the asymptotics of solutions. In each case we use a criterion by Gol’dsheid and Margulis (i.e. Zariski denseness of the group… (More)


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