Faculty - Oluwasegun Ibrahim

Contact Information Phone: (773) 995-2144 Email: oibrah21@csu.edu Office: HWH 227

Education Ph.D. University of Benin, Nigeria M.Sc. African Institute for Mathematical Sciences, Rwanda M.Sc. University of Benin, Nigeria B.Sc. Adekunle Ajasin University, Nigeria

Research Interest

His research bridges applied mathematics and societal problem-solving through advanced mathematical, statistical, and computational modeling. His work spans a broad range of interdisciplinary areas, including infectious diseases and public health, pharmaceutical and non-pharmaceutical interventions, health economics and outcomes, actuarial and data science, crime and violence dynamics, behavioral science, celestial and orbital mechanics, artificial intelligence and machine learning.

Representative Presentations and Publications

1. Ibrahim, Oluwasegun M., and Piers W. Lawrence. "Advancing Epidemiological Modeling: Spectral Collocation for Sleeping Sickness." Discover Applied Sciences 8, no. 1 (2026): 97. https://link.springer.com/article/10.1007/s42452-025-07992-1
2. Gibson, Graham C., Fox, Spencer J., Javan, Emily, Ptak, Susan E., Ibrahim, Oluwasegun M., Lachmann, Michael, and Meyers, Lauren A. "Improving Outbreak Forecasts through Model Augmentation." Proceedings of the National Academy of Sciences 122, no. 43 (2025): e2508575122. https://www.pnas.org/doi/10.1073/pnas.2508575122
3. Ibrahim, Oluwasegun M., Daniel Okuonghae, and Monday N. O. Ikhile. "Epidemiological Modeling of Criminal Gangs with Multi-Delay Persistence and Intervention Instability." Discover Psychology 5 (2025): 146. https://link.springer.com/article/10.1007/s44202-025-00478-6
4. Ibrahim, Oluwasegun M., Zhaohui Du, and Lauren A. Meyers. "Modeling the Mitigation of US Seasonal Influenza in Households Using Antivirals for Prophylaxis and Treatment." Institute of Statistical and Modeling of Infectious Diseases, Emory University, (2024). https://doi.org/10.26153/tsw/59919
5. Ibrahim, Oluwasegun M., Daniel Okuonghae, and Monday N. O. Ikhile. "A Mathematical Model of Criminal Gang Rivalry: Understanding the Dynamics and Implications." Results in Control and Optimization (2024): 100398. https://www.sciencedirect.com/science/article/pii/S2666720724000286
6. Howard, Elaine E., Miao, Xiaodan, Mason, Quinn, Samyono, Adi, Javan, Emily, Mullen, Charlee, Fletcher, Loren, and Ibrahim, Oluwasegun M. "AI Modeling: Community Sentiment Analysis on Pandemic Policies." Texas Advanced Computing Center, (2023). https://doi.org/10.26153/tsw/60089
7. Ibrahim, Oluwasegun M., Daniel Okuonghae, and Monday N. O. Ikhile. "Optimal Control Model for Criminal Gang Population in a Limited-Resource Setting." International Journal of Dynamics and Control 11 (2023): 835–850. https://link.springer.com/article/10.1007/s40435-022-00992-8
8. Ibrahim, Oluwasegun M. "A Mathematical Model of Juvenile Delinquency in New York State." In Mathematical Modeling Research, edited by Kara Maki, 1–10. Rochester, NY: Rochester Institute of Technology, (2023). https://scholarworks.rit.edu/article/2079
9. Ibrahim, Oluwasegun M., Daniel Okuonghae, and Monday N. O. Ikhile. "Mathematical Modeling of the Population Dynamics of Age-Structured Criminal Gangs with Correctional Intervention Measures." Applied Mathematical Modelling 107 (2022): 39–71. https://www.sciencedirect.com/science/article/pii/S0307904X22000713
10. Ibrahim, Oluwasegun M., and Monday N. O. Ikhile. "Inverse Hybrid Linear Multi-Step Methods for Special Second-Order Inverse Problems." International Journal of Applied and Computational Mathematics 6, no. 158 (2021): 1–17. https://link.springer.com/article/10.1007/s40819-020-00910-6
11. Ibrahim, Oluwasegun M., and Monday N. O. Ikhile. "A Generalized Family of Symmetric Multistep Methods with Minimum Phase-Lag for Initial Value Problems in Ordinary Differential Equations." Mediterranean Journal of Mathematics 17, no. 87 (2020): 1–30. https://link.springer.com/article/10.1007/s00009-020-01507-5
12. Ibrahim, Oluwasegun M., and Piers W. Lawrence. "Spectral rectangular collocation formula: an approach for solving oscillatory initial value problems and/or boundary value problems in ordinary differential equations." Turkish Journal of Analisis and Number Theory 7, no. 1 (2019): 11-17.
13. Ibrahim, Oluwasegun M., and Dare Jayeola. "On the effect of capital asset pricing model on precious metals and crude oil investments." Control Science and Engineering 2, no. 2 (2018): 66-70.
14. Ibrahim, Oluwasegun M. High Order Symmetric Super-Implicit Hybrid LMMs with Minimal Phase-Lag: Solving Differential Equations Using Numerically Stable Super-Implicit Formula. ISBN 978-6202023795, (2017). https://www.amazon.com/Symmetric-Super-Implicit-Hybrid-Minimal-Phase-Lag/dp/6202023791

Scholarships/Fellowships/Grants/Awards

1. NIH/CDC/Emory University SISMID Fellowship (NIH R25 AI147391 and the CDC NU38FT0000001) | 2024-2026

2. Mathematician Honoree Award | US Mathematically Gifted and Black | 2025
3. Early Career Postdoctoral Fellowship: Office of Postdoctoral Affairs | University of Texas at Austin | 2024-2025
4. Postdoctoral Fellowship | University of Texas at Austin | 2022-2026

1. • CDC-Center for Forecasting and Outbreak Analytics (Grant No: CDC-RFA-FT-23-0069)
   • US Council of State and Territorial Epidemiologists (CSTE) Funding (Grant No: NU38OT000297)
   • US Department of Health and Human Services and CDC (Grant No: 23NU38FT000008)

5. Outstanding Alumnus of African Institute for Mathematical Sciences | Next Einstein Initiative | 2021
6. Outstanding Personality (Omoluabi) Governor’s Award for Academic Excellence | Ekiti State Government | 2021
7. Graduate Fellowship | Petroleum Technology Development Fund Scholarship | 2019
8. Graduate Fellowship | Ekiti State Government Scholarship | 2018
9. Graduate Fellowship | African Institute for Mathematical Sciences and Mastercard Foundation Scholarship | 2016
10. Undergraduate Fellowship | Ekiti State Government | 2012
11. Undergraduate Fellowship | Odu’a Investment Company Limited | 2011

Professional Memberships

1. American Mathematical Society (AMS)
2. Society for Industrial and Applied Mathematics (SIAM)
3. Society for Mathematical Biology (SMB)
4. Mathematical Association of America (MAA)
5. International Society of Pharmacometrics (ISOP)
6. International Society for Pharmacoeconomics and Outcomes Research (ISPOR)  

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