Joshua Lee Padgett



Assistant Professor
University of Arkansas
Department of Mathematical Sciences
Fayetteville, Arkansas 72701

Email: padgett@uark.edu

Office: SCEN 225

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I am currently an Assistant Professor in the Department of Mathematical Sciences at the University of Arkansas, an Affiliated Faculty member at the Center for Astrophysics, Space Physics, and Engineering Research, and a Research Partner/Honorary Adjunct Faculty in the Department of Mathematics and Statistics at Texas Tech University. I received my Ph.D. in Mathematics from Baylor University in August 2017 under the advisement of Qin "Tim" Sheng and completed my postdoctoral training in the Department of Mathematics and Statistics at Texas Tech University. Before that I received my B.S. in Mathematics from Gardner-Webb University, where I also was a member of the Track and Field team (I competed in the javelin and hammer throw). My undergraduate studies also included cellular biology, which led to several semesters of research into various aspects of cancer metabolism (in particular, the Warburg effect).

Here is a copy of my most recent Curriculum Vitae (updated June 2021).

Joshua Lee Padgett's Google Scholar profile.

Joshua Lee Padgett's ResearchGate profile.

A link with the information regarding the XVIII Red Raider Minisymposium I am co-organizing, may be found here. Registration for the event is now open.

A link with the information regarding the JMM Special Session I co-organized in 2020, may be found here.

With the support of Erica Graham, Candice Price, and Shelby Wilson, an amazing (former) colleague of mine, Raegan Higgins, maintains the website Mathematically Gifted and Black (which can be found by following the link). Please visit this webpage in order to learn more about the issue that black scholars face in academia and mathematics. The page also contains details regarding how one can support and nominate black scholars.

Note: I am currently looking for graduate students. Interested students should email me or fill out the form here. While I am interested in a wide range of topics (and, in general, am willing to learn about others), potential research students should take a look at my research descriptions below or my recent publications to have a better idea of the topics I am likely to consider or propose.

Recent Updates

Below you can find some (what I believe to be) important recent updates regarding myself or my research.


Research Interests

My primary research interests lie in the areas of numerical analysis, applied mathematics, and computational mathematics. I am particularly interested in problems arising in biology and physics whichexhibit nonstandard computational challenges—such as problems with singular, nonlocal, or stochastic influences. My work has employed a variety of mathematical techniques, with a particular focus on combining computational techniques with those from operator theory, spectral theory, and Lie group theory. My most significant contributions have been the development of the abstract numerical analysis for such problems, which allows for the obtained results to have a wider range of applications. Such efforts allow for the construction of qualitatively and quantitatively superior computational algorithms. Moreover, it allows for the results to be applied to numerous physical problems of interest, such as those arising in mathematical biology, combustion theory, and plasma physics.

My recent research efforts have been focused on machine learning and deep artificial networks, with a particular emphasis on how these tools may be employed to efficiently approximate high-dimensional partial differential equations. This area is of great importance in the scientific community and garners interest from a wide array of academic disciplines. My current focus is on the theoretical and mathematical considerations of deep learning; i.e., my focus is on proving theorems regarding deep artificial networks. The mathematics for this field is still in its infancy, and as such, there are a great deal of exciting problems to be pursued in this direction.

Topics of interest:

  • Applied mathematics
  • Numerical analysis
  • Computational mathematics
  • Geometric and Lie group integration methods
  • Operator splitting methods
  • Quenching-combustion differential equations
  • Singular integral equations
  • Stochastic differential equations
  • Machine learning
  • Mathematics for deep learning

Grants and Funding

The following is a list of grant proposals that have either been funded, or are pending.

NSF-1903450
Onset of Turbulence in Dusty Plasma Liquids (2019 - 2022) Amount: $257,840
Investigators: Evdokiya Kostadinova  • Constanze Liaw  • Lorin Matthews  • Joshua Lee Padgett
NSF-1956396
Modeling in a Heterogeneous World (XVIII Red Raider Mini-Symposium) (2020 - 2021) Amount: $17,750
Investigators: Linda J. S. Allen  • Joshua Lee Padgett  • Angela Peace  • Kenneth Schmidt  • Wenjing Zhang

My Dogs

Below are some pictures of my two dogs: Murphy (an Australian Shepherd) and Memphis (a Goldendoodle). Murphy is now approximately five years old and Memphis is now approximately two and a half years old.