“…To obtain the solution of the Cauchy problem defined by ( 1) and ( 2) we use a semigroup method [5], [6], [7]. Let L s 2 (L) be the Hilbert space of functions ψ L s (x 1 , ..., x s ), x i ∈ R(L), and B L s be the Banach space of positive-definite, self-adjoint nuclear operators ρ L s (x 1 , ...,…”