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 The analytic theory of nomographing a function of a complex variable of the first classI. A. Vil'ner 3 Linear equations with variable coefficients and small parameters in the highest derivativesI. S. Gradshtein 47 Summation formulas containing special numerical functionsE. A. Anfert'eva 69 On the classification of separable and coseparable topological Abelian groupsN. Ya. Vilenkin 85 Complete systems of symmetric and skew-symmetric tensorsG. B. Gurevich 103 Periodic $ZA$-extensions of complete groupsS. N. Tschernikow 117 On the number of subgroups of given index of a finite $p$-groupP. E. Dyubyuk 129 A theorem on bicompact groupsL. P. Grabar' 139 The structure of ideals in rings $R_\alpha$È. È. Shnol' 143 On systems of differential equations containing parametersA. N. Tikhonov 147