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JOURNALS // Vestnik Sankt-Peterburgskogo Universiteta. Seriya 10. Prikladnaya Matematika. Informatika. Protsessy Upravleniya // Archive

Vestnik S.-Petersburg Univ. Ser. 10. Prikl. Mat. Inform. Prots. Upr., 2020 Volume 16, Issue 4, Pages 423–436 (Mi vspui468)

This article is cited in 3 papers

Applied mathematics

On the qualitative properties of the solution of a nonlinear boundary value problem in the dynamic theory of $p$-adic strings

Kh. A. Khachatryanabc, H. S. Petrosyanad

a Lomonosov Moscow State University, 1, Leninskiye Gory, GSP-1, Moscow, 119991, Russian Federation
b Yerevan State University, 1, Alex Manoogian ul., Yerevan, 0025, Republic of Armenia
c National Academy of Sciences of the Republic of Armenia, 24/5, Marshal Baghramyan pr., Yerevan, 0019, Republic of Armenia
d Armenian National Agrarian University, 74, ul. Teryana, Yerevan, 0009, Republic of Armenia

Abstract: The article considers a boundary value problem for a class of singular integral equations with an almost total-difference kernel and convex nonlinearity on the positive half-line. This problem arises in the dynamic theory of $ p $-adic open-closed strings. It is proved that any non-negative and bounded solution of a given boundary value problem is a continuous function and the difference between the limit and the solution is itself an integrable function on the positive half-line. For a particular case, it is proved that the solution is a monotonically non-decreasing function. A uniqueness theorem is established in the class of nonnegative and bounded functions. At the conclusion of the article, a specific applied example of this boundary problem is given.

Keywords: boundary value problem, convexity, continuity, summability, monotonicity, solution limit.

UDC: 517.968.4+512.625.5

MSC: 45G05, 65R20

Received: January 21, 2020
Accepted: October 23, 2020

DOI: 10.21638/11701/spbu10.2020.407



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