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  • Article
    Citation - WoS: 63
    Citation - Scopus: 78
    Fixed Points for Generalized (α, Ψ)-Contractions on Generalized Metric Spaces
    (Springeropen, 2014) Aydi, Hassen; Karapinar, Erdal; Samet, Bessem
    In this paper, we introduce some generalized (alpha, psi)-contractive mappings in the setting of generalized metric spaces and, based on the very recent paper (Kirk and Shahzad in Fixed Point Theory Appl. 2013:129, 2013), we omit the Hausdorff hypothesis to prove some fixed point results involving such mappings. Some consequences on existing fixed point theorems are also derived.
  • Article
    Citation - WoS: 27
    Citation - Scopus: 25
    A Discussion on Generalized Almost Contractions Via Rational Expressions in Partially Ordered Metric Spaces
    (Springeropen, 2014) Mustafa, Zead; Karapinar, Erdal; Aydi, Hassen
    The main purpose of this paper is to give some fixed point results for mappings involving generalized (phi, psi)-contractions in partially ordered metric spaces. Our results generalize, extend, and unify several well-known comparable results in the literature (Jaggi in Indian J. Pure Appl. Math. 8(2):223-230, 1977, Harjani et al. in Nonlinear Anal. 71:3403-3410, 2009, Luong and Thuan in Fixed Point Theory Appl. 2011:46, 2011). The presented results are supported by three illustrative examples.
  • Article
    Citation - WoS: 12
    Citation - Scopus: 6
    A note on 'Modified proof of Caristi's fixed point theorem on partial metric spaces, Journal of Inequalities and Applications 2013, 2013:210'
    (Springeropen, 2013) Aydi, Hassen; Karapinar, Erdal; Kumam, Poom
    In this note, we emphasize that the proofs and statements of the main results of the paper 'Modified proof of Caristi's fixed point theorem on partial metric spaces' (Journal of Inequalities and Applications 2013, 2013:210) do not have any utility to use the partial metric. Hence, it has no contribution to either partial metric theory or Caristi-type fixed point problems.