... D.Hilbert: Methods of Mathematical Physics[2] I.Rubinstein, L.Rubinstein: Partial differential equations in classicalmathematical physics, 1993[3] V.S.Vladimirov: Equations of mathematical physics, ... w (ξ) has the unique analytic continuation w (ζ) atC according to Paley-Wiener theorem. The integral (4) converges at in nity,since Γ coincides with R in the complement to a disc, the function ... Relativity, Wiley-Interscience Publ.,1975[3] L.Landau, E.Lifshitz: The classical theory of fields, Pergamon, 1985[4] I.Rubinstein, L.Rubinstein: Partial differential equations in classicalmathematical...