Abdullahi Umar
Impact in
-
- Advanced Combinatorial Mathematics
-
- semigroups and automata theory
- Advanced Algebra and Logic
Papers in
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- semigroups and automata theory 25
- Advanced Algebra and Logic 8
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- Geometric and Algebraic Topology 7
- Co-authors
- Kabiru Jega Umar (2 shared papers)M. L. Deadman (1 shared paper)Alexander Burstein (1 shared paper)King Fahd (1 shared paper)Noraliani Alias (2 shared papers)Saad Eddin Ibrahim (2 shared papers)Maxwell M. Nwegbu (1 shared paper)Georg Klein (1 shared paper)
- Journals
- Semigroup Forum (5 papers)The Journal of Difference Equations and Applications (2 papers)Proceedings of the Royal Society of Edinburgh Section A Mathematics (2 papers)Environmental Toxicology and Chemistry (1 paper)Discrete Mathematics (1 paper)
- Partner nations
- NigeriaSaudi ArabiaUnited States
In The Last Decade
Abdullahi Umar
41 papers receiving 243 citations
Peers
Comparison fields: 5 of 52
- Discrete Mathematics and Combinatorics 46
- Computational Theory and Mathematics 200
- Geometry and Topology 83
- Algebra and Number Theory 30
- Management Science and Operations Research 37
Countries citing papers authored by Abdullahi Umar
This map shows the geographic impact of Abdullahi Umar'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 Abdullahi Umar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Abdullahi Umar more than expected).
Fields of papers citing papers by Abdullahi Umar
This network shows the impact of papers produced by Abdullahi Umar. 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 Abdullahi Umar. The network helps show where Abdullahi Umar may publish in the future.
Co-authors
The 21 scholars most cited alongside Abdullahi Umar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 52 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | 1992 | 47 | |
| 2 | 2006 | 27 | |
| 3 | 2004 | 23 | |
| 4 | 2004 | 22 | |
| 5 | 1993 | 17 | |
| 6 | 1996 | 14 | |
| 7 | 2021 | 11 | |
| 8 | 2015 | 11 | |
| 9 | 1997 | 9 | |
| 10 | 2004 | 8 | |
| 11 | 2021 | 7 | |
| 12 | Combinatorial results for certain semigroups of partial isometries of a finite chain | 2014 | 6 |
| 13 | 2007 | 6 | |
| 14 | Some combinatorial problems in the theory of symmetric inverse semigroups | 2010 | 6 |
| 15 | Combinatorial Results for Semigroups of Order-Decreasing Partial Transformations | 2004 | 5 |
| 16 | 2021 | 5 | |
| 17 | 2019 | 5 | |
| 18 | 2025 | 4 | |
| 19 | Radial Distribution Network Enhancement with D-Statcom Using Bacterial Foraging Algorithm | 2018 | 4 |
| 20 | 1997 | 4 |
About Abdullahi Umar
Abdullahi Umar is a scholar working on Computational Theory and Mathematics, Geometry and Topology, Discrete Mathematics and Combinatorics, Molecular Biology and Artificial Intelligence, having authored 52 papers that have together received 271 indexed citations. Recurring topics across this work include semigroups and automata theory (25 papers), Advanced Algebra and Logic (8 papers), Geometric and Algebraic Topology (7 papers), Advanced Combinatorial Mathematics (5 papers), Fuzzy and Soft Set Theory (4 papers), Groundwater and Watershed Analysis (3 papers), Chemical Synthesis and Analysis (3 papers) and Mathematical Dynamics and Fractals (3 papers). The work is most often cited by research in Discrete Mathematics and Combinatorics (46 citations), Computational Theory and Mathematics (200 citations), Geometry and Topology (83 citations), Algebra and Number Theory (30 citations) and Management Science and Operations Research (37 citations). Abdullahi Umar has collaborated with scholars based in Nigeria, Saudi Arabia and United States. Frequent co-authors include Kabiru Jega Umar, M. L. Deadman, Alexander Burstein, King Fahd, Noraliani Alias, Saad Eddin Ibrahim, Maxwell M. Nwegbu, Georg Klein, Olumayowa Abimbola Oninla and Adamu Uzairu. Their work appears in journals such as Semigroup Forum, The Journal of Difference Equations and Applications, Proceedings of the Royal Society of Edinburgh Section A Mathematics, Environmental Toxicology and Chemistry and Discrete Mathematics.
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 delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.