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Listar por autor "Karapinar, Erdal"

Mostrando ítems 1-7 de 7

A Discussion on p-Geraghty Contraction on mw-Quasi-Metric Spaces

Alegre Gil, Maria Carmen; Fulga, Andreea; Karapinar, Erdal; Tirado Peláez, Pedro (MDPI AG, 2020-09)

[EN] In this paper we consider a kind of Geraghty contractions by using mw-distances in the setting of complete quasi-metric spaces. We provide fixed point theorems for this type of mappings and illustrate with some examples ...
Characterizations of quasi-metric and G-metric completeness involving w-distances and fixed points

Karapinar, Erdal; Romaguera Bonilla, Salvador; Tirado Peláez, Pedro (De Gruyter Open, 2022-12-13)

[EN] Involving w-distances we prove a fixed point theorem of Caristi-type in the realm of (non -necessarily T-1) quasi-metric spaces. With the help of this result, a characterization of quasi-metric completeness is obtained. ...
Contractive multivalued maps in terms of Q-functions on complete quasimetric spaces

Karapinar, Erdal; Romaguera Bonilla, Salvador; Tirado Peláez, Pedro (SpringerOpen, 2014-02)

In this paper we prove the existence of a fixed point for multivalued maps satisfying a contraction condition in terms of Q-functions, and via Bianchini-Grandolfi gauge functions, for complete T-0-quasipseudometric spaces. ...
On the weak form of Ekeland s Variational Principle in quasi-metric spaces

Karapinar, Erdal; Romaguera Bonilla, Salvador (Elsevier, 2015-04-01)

[EN] We show that a quasi-metric space is right K-sequentially complete if and only if it satisfies the property of the weak form of Eke land's Variational Principle. This result solves a question raised by S. Cobzas (2011) ...
Quadruple fixed point theorems for nonlinear contractions on partial metric spaces

Karapinar, Erdal; Tas, Kenan (Editorial Universitat Politècnica de València, 2014-04-07)

[EN] The notion of coupled fixed point was introduced by Guo and Laksmikantham [12]. Later Gnana Bhaskar and Lakshmikantham in [11] investigated the coupled fixed points in the setting of partially ordered set by defining ...
Revisiting Bianchini and Grandolfi Theorem in the Context of Modified omega-Distances

Alegre Gil, Maria Carmen; Karapinar, Erdal; Marín Molina, Josefa; Tirado Peláez, Pedro (Springer-Verlag, 2019-12)

[EN] In this paper, we establish a proof for Bianchini and Grandolfi Theorem in the context of quasi-metric spaces via modified omega-distances. As consequences of our main results, we derive several existing fixed point ...
Some fixed point theorems on the class of comparable partial metric spaces

Karapinar, Erdal (Universitat Politècnica de València, 2011-10-01)

[EN] In this paper we present existence and uniqueness criteria of a fixed point for a self mapping on a non-empty set endowed with two comparable partial metrics.