Advisor(s)

Ian Knowles

Committee Member(s)

Chengcui Zhang
Marius Nkashama
Roger Sidje
Satyaki Roy

Document Type

Dissertation

Date of Award

6-1-2026

Degree Name

Doctor of Philosophy (PhD)

School

College of Arts and Sciences

Department

Applied Mathematics

Abstract

In 2021 Fitzgibbon, Morgan, Webb, and Wu used a modified SEIR (susceptible, exposed, infected, and recovered) model to predict how COVID-19 spread through Brazil [12]. For their model, six constant coefficients were used that were fitted, referenced, or assumed. In this thesis, we geo-spatially modify their SEIR model and formulate an inverse problem to recover the now spatial coefficients of the model. We first show there exists a unique solution to the modified model. To solve the inverse problem, we modify an inverse method [17] that focused on minimizing convex functionals. These recovered spatial coefficients can be used with Matlab’s PDE solver to give a better, and longer, prediction of COVID-19 cases in Brazil.

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