This article is cited in 6 papers

The method of perturbations for singular problems

S. A. Lomov


Abstract: In this paper the regularization of a singularity with respect to a parameter is derived by means of an extension of the original operator and subsequent application of perturbation theory in an unbounded space, and used to solve an “extended” problem asymptotically. It is proved that this asymptotic solution is unique. An appropriate restriction of the asymptotic solution thus obtained will be an asymptotic solution of the original problem; this restriction is also unique. The theory of this method is illustrated by an example of an ordinary linear system of general form.

UDC: 517.9

MSC: Primary 34E15; Secondary 35B25

Received: 12.02.1971

 English version: Mathematics of the USSR-Izvestiya, 1972, 6:3, 631–648

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