Linear differential equations with constant coefficients on arcwise-connected manifolds

The paper proves a theorem concerning reducibility of a completely integrable linear differential equation on an arcwise-connected manifold to one with constant coefficients.Translated from Matematicheskie Zametki, Vol. 19, No. 5, pp. 773–782, May, 1976.In conclusion, the author thanks S. G. Krein for useful discussions.     

A canonical formalism and its geometric interpretation in the covariant theory of the classical electron

A canonical formalism is constructed for the covariant model of the classical electron proposed in [1, 2, 3]. For the geometric interpretation the notion of the coincidence of the tangent space to the space of outer coordinates with a subspace of the tangent space to the space of inner variables is introduced.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 88–92, June, 1976.In conclusion, the authors wish to thank Yu. G. Borisovich for his constant interest in this work.