Another perspective on Kannan contraction

Inspired by the well-known result stating that if any iterate of a mapping is a Banach contraction on a complete metric space, then the mapping itself possesses a unique fixed point, we investigate that claim for a Kannan contraction but by retaining the left-hand side of the inequality as per the mapping itself. With an additional assumption of $k$-continuity, the existence and uniqueness of a fixed point is obtained for a new class of contractions, $m$-Kannan contraction, on a complete metric space. Several examples are given in order to substantiate many theoretical claims such as discontinuity at the unique limit point of the iterative sequence or the ones testifying that this class is wider than the class of Kannan mappings.

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Publication Details

Journal
Hacettepe Journal of Mathematics and Statistics
Published
2025-01-27
DOI
https://doi.org/10.15672/hujms.1528252
Primary Topic
Fixed Point Theorems Analysis
Type
article
Field-Weighted Citation Impact
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article

Another perspective on Kannan contraction

Marija Cvetković
Hacettepe Journal of Mathematics and Statistics
Fixed Point Theorems Analysis
article

Another perspective on Kannan contraction

Marija Cvetković
article en

Abstract

Inspired by the well-known result stating that if any iterate of a mapping is a Banach contraction on a complete metric space, then the mapping itself possesses a unique fixed point, we investigate that claim for a Kannan contraction but by retaining the left-hand side of the inequality as per the mapping itself. With an additional assumption of $k$-continuity, the existence and uniqueness of a fixed point is obtained for a new class of contractions, $m$-Kannan contraction, on a complete metric space. Several examples are given in order to substantiate many theoretical claims such as discontinuity at the unique limit point of the iterative sequence or the ones testifying that this class is wider than the class of Kannan mappings.

Hacettepe Journal of Mathematics and StatisticsVol. 54(3)
University of Nis (RS)
Openalex Percentile: Top 96%
Fixed Point Theorems Analysis
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