# David C. Marshall, Ph.D.

- Chair
- Associate Professor
- Department Advising Coordinator

**Department:** Mathematics

**Office:** Howard Hall 242

**Office Hours**: Sundays 7:00-8:00pm

Mondays 3:00-4:00pm

Tuesdays 12:00-1:00pm

(via Zoom)

**Phone:** 732-571-4465

**Email:** dmarshal@monmouth.edu

I spent the majority of my first 23 years living in Southern California where I attended the California State University at Fullerton, majoring in mathematics and minoring in philosophy. My calculus professor, Dr. Mario Martelli, took me under his wing and became an important mentor for many years. He took me to conferences, invited me to collaborate on a research problem, and ultimately convinced me that I can do mathematics. I have him to thank for my decision to pursue the life of a mathematician.

I left California to attend graduate school at the University of Arizona in Tucson, AZ where I met and married my wife Dr. Susan Marshall. I also earned my Ph.D. in mathematics there while working with Dr. William McCallum. I then spent two years working at McMaster University in Hamilton, Ontario, Canada which was a wonderful adventure. Susan and I then spent two years together working at The University of Texas at Austin before settling into New Jersey at Monmouth University in 2004. Along the way we added two amazing children to our list of accomplishments.

## Education

Ph.D. in Mathematics, University of Arizona

B.A. in Mathematics, California State University-Fullerton

## Mathematical Interests

My past mathematical research has been in the overlapping areas of algebra, number theory, and geometry. More specifically, my past work involved the study of algebraic number fields and algebraic curves. These days I am more interested in problems from these areas and others that allow me to educate and collaborate with undergraduate students. I’m also very interested in mathematical pedagogy and teaching, and have co-authored an innovative textbook and accompanying materials for an inquiry-based undergraduate number theory course.

## Professional Activities

- Cubic Comparability Graphs, with undergraduate student Olivia Verni, School of Science Summer Research Program, Monmouth University 2020
- The Mathematics and Ethics of Infinity, MAA Contributed Paper Session, AMS-MAA Joint Mathematics Meetings, San Diego, CA, January 2018
- Recipient of the Sr. Stephanie Sloyan Award for Distinguished Service, MAA-NJ Section, 2018
- Reflections in Geometry, MAA Contributed Paper Session, MAA MathFest, Portland, OR, 2014
- Executive Committee Member, New Jersey Section of the Mathematical Association of America, 2009-2016

## Courses

### Recently Taught Classes

#### 2023 Spring

- Combinatorics and Graph Theory – MA 318

#### 2022 Fall

- Number Theory – MA 314

#### 2022 Spring

#### 2021 Fall

- Calculus With Analytic Geometry I – MA 125
- Foundations of Elementary Mathematics I – MA 203
- Number Theory – MA 314

#### 2021 Summer B

- Calculus With Analytic Geometry I – MA 125

#### 2021 Spring

#### 2020 Fall

#### 2020 Spring

### Frequently Taught Classes

- Applied Discrete Mathematics (MA 130)
- Calculus With Analytic Geometry I (MA 125)
- Calculus With Analytic Geometry II (MA 126)
- Combinatorics and Graph Theory (MA 318)
- Foundations of Elementary Mathematics I (MA 203)
- Introduction to Mathematical Reasoning (MA 120)
- Modern Algebra (MA 410)
- Number Theory (MA 314)
- Quantitative Reasoning and Problem Solving (MA 100)