Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Generalized contractions on partial metric spaces
2010246 citationsİshak Altun, Hakan Şimşek et al.profile →
Some Fixed Point Theorems on Ordered Metric Spaces and Application
This map shows the geographic impact of İshak Altun's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by İshak Altun with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites İshak Altun more than expected).
This network shows the impact of papers produced by İshak Altun. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by İshak Altun. The network helps show where İshak Altun may publish in the future.
Co-authorship network of co-authors of İshak Altun
This figure shows the co-authorship network connecting the top 25 collaborators of İshak Altun.
A scholar is included among the top collaborators of İshak Altun based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with İshak Altun. İshak Altun is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Altun, İshak, et al.. (2019). A Related Fixed Point Theorem for $F$-Contractions on Two Metric Spaces. DergiPark (Istanbul University).1 indexed citations
6.
Sedghı, Shaban, et al.. (2019). Fixed Point Results on b-Metric Space via b-Simulation Functions. Thai Journal of Mathematics.1 indexed citations
Altun, İshak, Gülhan Mınak, & Murat Olgun. (2017). CLASSIFICATION OF COMPLETENESS OF QUASI METRIC SPACE AND SOME FIXED POINT RESULTS. Nonlinear functional analysis and applications. 371–384.6 indexed citations
11.
Altun, İshak, et al.. (2016). Common fixed point results on vector metric spaces. 5(1). 29–39.2 indexed citations
Sedghı, Shaban, İshak Altun, & Nabi Shobe. (2012). Some properties of T-metric spaces and a common fixed point theorem. Fasciculi Mathematici.1 indexed citations
15.
Sedghı, Shaban, İshak Altun, & Nabi Shobe. (2012). Common Fixed Point Theorems for four mappings in d Metric spaces. Thai Journal of Mathematics. 7(1). 9–19.
16.
Altun, İshak & Duran Türkoğlu. (2010). SOME FIXED POINT THEOREMS FOR WEAKLY COMPATIBLE MULTIVALUED MAPPINGS SATISFYING SOME GENERAL CONTRACTIVE CONDITIONS OF INTEGRAL TYPE. Bulletin of the Iranian Mathematical Society. 36(1). 55–67.8 indexed citations
Altun, İshak & Duran Türkoğlu. (2009). Some fixed point theorems for mappings satisfying contractive condition of integral type on d-complete topological spaces. Fasciculi Mathematici. 5–15.4 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
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Rankless may not fully capture the entirety of a scholar's output or impact.