THIRD-ORDER DIFFERENTIAL EQUATIONS WITH MULTIPLE CHARACTERISTICS: DEGENERATION AND UNKNOWN EXTERNAL INFLUENCE

Alexander Ivanovich Kozhanov, Guzel Rashitkhuzhakyzy Ashurova

2024

Closed access Metadata (CSL-JSON)
DOI 10.47475/2500-0101-2024-9-4-585-595
Data confidence 70 medium
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

Inverse problems of determination together with the solution of a degenerate differential equation with multiple characteristics of an unknown coefficient representing external influence (the free term) are studied. The nature of degeneration in the studied equation, as well as the type of the unknown coefficient, are determined by the time variable. Theorems of existence and uniqueness of regular solutions (solutions that possess all generalized derivatives according to S.L. Sobolev, which are involved in the equation) are proved for the studied problems.