Zobrazeno 1 - 10
of 193
pro vyhledávání: '"Adrian Petruşel"'
Autor:
Adrian Petruşel, Gabriela Petruşel
Publikováno v:
Arabian Journal of Mathematics, Vol 12, Iss 2, Pp 423-430 (2022)
Abstract In this paper, we will prove some fixed point theorems for graphical contractions in complete b-metric spaces. Then, some common fixed point results for a pair of mappings in complete b-metric spaces will be deduced. Our results extend some
Externí odkaz:
https://doaj.org/article/9ed3b71103944008ac2efe7390e6b503
Publikováno v:
Axioms, Vol 13, Iss 1, p 24 (2023)
In the context of a complete metric space, the most important fixed-point result for multi-valued operators was given in 1969. Many extensions of this fixed-point principle for multi-valued operators were proved by different authors. Based on some of
Externí odkaz:
https://doaj.org/article/f305b0c533ef4f50abd986fecc708919
Publikováno v:
Axioms, Vol 12, Iss 6, p 548 (2023)
In the original article [...]
Externí odkaz:
https://doaj.org/article/a133b3da53f842738d81dfc0084adbe9
Publikováno v:
Axioms, Vol 12, Iss 3, p 274 (2023)
In this paper, we will prove several new results related to the concept of the multi-valued Feng–Liu contraction. An existence, approximation and localization fixed point theorem for a generalized multi-valued nonself Feng–Liu contraction and a n
Externí odkaz:
https://doaj.org/article/cfc3e5beb2464346947980ebe6f2e36c
Publikováno v:
Axioms, Vol 11, Iss 10, p 563 (2022)
In this paper, we consider several problems related to the so-called multi-valued Feng–Liu–Subrahmanyan contractions in complete metric spaces. Existence of the fixed points and of the strict fixed points, as well as data dependence and stability
Externí odkaz:
https://doaj.org/article/397c7f203ae5429896eef13bd4f9467b
Publikováno v:
Discrete Dynamics in Nature and Society, Vol 2019 (2019)
The purpose of this article is twofold. Firstly, combining concepts of graph theory and of fixed point theory, we will present a fixed point result for Kannan type mappings, in the framework of recently introduced, graphical b-metric spaces. Appropri
Externí odkaz:
https://doaj.org/article/c2475b48a6b346e4a8b4d620047ce966
Publikováno v:
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas. 117
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88fe0fc8bb92466ffe9f59ffcd19b37d
https://doi.org/10.1007/s13398-023-01435-5
https://doi.org/10.1007/s13398-023-01435-5
Publikováno v:
Axioms, Vol 9, Iss 4, p 141 (2020)
In this manuscript we investigate the existence of start-points for the generalized weakly contractive multi-valued mappings in the setting of left K-complete quasi-pseudo metric space. We provide an example to support the given result.
Externí odkaz:
https://doaj.org/article/917519220d734913bd654280907b32a0
Autor:
Adrian Petruşel, Ioan Rus
Publikováno v:
Applicable Analysis and Discrete Mathematics. 16:189-201
Several notions of abstract Volterra operators on spaces of functions of one variable are well known. In this paper, we introduce various notions of abstract Volterra operators in spaces of functions of several variables. Some fixed point equations w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af7899c095ff7f657c21014b7e123a42
https://doi.org/10.2298/aadm180615016p
https://doi.org/10.2298/aadm180615016p
Publikováno v:
The Journal of Analysis.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cbcaa29fbcb16b5303d1f5a142c6b2e
https://doi.org/10.1007/s41478-022-00533-8
https://doi.org/10.1007/s41478-022-00533-8