Donal O’Regan
- Numerical Analysis top 0.01%
- Differential Equations and Numerical Methods 300
- Applied Mathematics top 0.01%
- Nonlinear Differential Equations Analysis 692
- Differential Equations and Boundary Problems 255
- Modeling and Simulation top 0.01%
- Fractional Differential Equations Solutions 259
- Geometry and Topology top 0.02%
- Fixed Point Theorems Analysis 231
- Computational Theory and Mathematics top 0.05%
- Advanced Mathematical Modeling in Engineering 151
- Optimization and Variational Analysis 143
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- Stability and Controllability of Differential Equations 176
- Co-authors
- Ravi P. AgarwalSaid R. GraceEduardo HernándezJuan J. NietoSnezhana HristovaJinRong WangSamir H. SakerPatricia J. Y. Wong
- Journals
- SHILAP Revista de lepidopterología (12 papers)Scientific Reports (2 papers)Fuzzy Sets and Systems (11 papers)
- Partner nations
- IrelandUnited StatesChina
In The Last Decade
Donal O’Regan
1.1k papers receiving 18.0k citations
Hit Papers
Peers
Comparison fields: 5 of 141
- Numerical Analysis 7.7k
- Applied Mathematics 14.7k
- Modeling and Simulation 6.4k
- Geometry and Topology 4.1k
- Computational Theory and Mathematics 3.6k
Countries citing papers authored by Donal O’Regan
This map shows the geographic impact of Donal O’Regan'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 Donal O’Regan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Donal O’Regan more than expected).
Fields of papers citing papers by Donal O’Regan
This network shows the impact of papers produced by Donal O’Regan. 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 Donal O’Regan. The network helps show where Donal O’Regan may publish in the future.
Co-authorship network
The 25 scholars most cited alongside Donal O’Regan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2025 | 0 | |
| 2 | 2023 | 0 | |
| 3 | 2023 | 0 | |
| 4 | 2022 | 1 | |
| 5 | 2020 | 6 | |
| 6 | Existence of solutions for Kirchhoff-type problems via the method of lower and upper solutions | 2019 | 4 |
| 7 | Nonemptyness and compactness of the solution set for fractional evolution inclusions with non-instantaneous impulses | 2019 | 7 |
| 8 | Oscillation criteria for solutions to nonlinear dynamic equations of higher order | 2016 | 5 |
| 9 | 2015 | 11 | |
| 10 | 2015 | 6 | |
| 11 | Stability with respect to initial time difference for generalized delay differential equations | 2015 | 1 |
| 12 | 2015 | 7 | |
| 13 | 2011 | 81 | |
| 14 | Some remarks on controllability of evolution equations in Banach spaces | 2009 | 5 |
| 15 | 2007 | 1 | |
| 16 | 2007 | 1 | |
| 17 | 2000 | 5 | |
| 18 | 1999 | 2 | |
| 19 | 1999 | 3 | |
| 20 | 1995 | 23 |
About Donal O’Regan
Donal O’Regan is a scholar working on Applied Mathematics, Numerical Analysis and Modeling and Simulation, having authored 1.2k papers that have together received 19.8k indexed citations. Recurring topics across this work include Nonlinear Differential Equations Analysis (692 papers), Differential Equations and Numerical Methods (300 papers), Fractional Differential Equations Solutions (259 papers), Differential Equations and Boundary Problems (255 papers), Fixed Point Theorems Analysis (231 papers), Stability and Controllability of Differential Equations (176 papers), Advanced Mathematical Modeling in Engineering (151 papers) and Optimization and Variational Analysis (143 papers). The work is most often cited by research in Numerical Analysis (7.7k citations), Applied Mathematics (14.7k citations) and Modeling and Simulation (6.4k citations). Donal O’Regan has collaborated with scholars based in Ireland, United States and China. Frequent co-authors include Ravi P. Agarwal, Said R. Grace, Eduardo Hernández, Ravi P. Agarwal, Juan J. Nieto, Snezhana Hristova, JinRong Wang, Samir H. Saker, Patricia J. Y. Wong and Maria Meehan. Their work appears in journals such as SHILAP Revista de lepidopterología, Scientific Reports and Fuzzy Sets and Systems.
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.