I am an assistant professor in the mathematics department at Agnes Scott College in Atlanta, GA.
My research interests are arithmetic dynamics and number theory. I am particularly (but not exclusively) interested in post-critically finite maps, the connections between arithmetic dynamics and arithmetic geometry, and the role of dynamical Belyi maps in arithmetic dynamics.
In 2022-2023 I was a postdoctoral scholar at Oregon State University working with Clay Petsche. From Fall 2019-Spring 2022 I was a post-doctoral fellow at Oklahoma State University working with Paul Fili. I received my PhD from the University of Hawaii in 2019 under Michelle Manes. Since 2021 I have spent my summers working with Thrive Scholars.
You can reach me at btobin at agnesscott.edu
I believe that mathematics should be accessible, inclusive, and fun. I also know that math is difficult. Even if you don’t know the answer today, that doesn’t mean you won’t know it tomorrow. Math can show up in unexpected places, and I want my students to have the confidence to tackle mathematical problems in the real world. I am always happy to chat about how these views influence my courses.
“It’s not a boring place to be, the mathematical world. It’s an extraordinary place; it’s worth spending time there.” -Marcus Du Sautoy
Upcoming events:
- Agnes Scott Alumni weekend!
- 58th Spring Topology and Dynamics Conference (Speaker)
- Southern Regional Number Theory Conference 2025
- 2025 AWM Research Symposium (Special session organizer)
Recent papers:
Tori Day, Rebecca DeLand, Jamie Juul, Cigole Thomas, Bianca Thompson, Bella Tobin. Dynamical Irreducibility of Certain Families of Polynomials over Finite Fields. Available on Arxiv: 2409.10467. Accepted.
Angelica Babei, Manami Roy, Holly Swisher, Bella Tobin, Fang-Ting Tu. Supercongruences arising from Ramanujan-Sato Series. Available on Arxiv: 2408.08844. Submitted.
Jacqueline Anderson, Emerald Stacy, Bella Tobin. On a slice of the cubic 2-adic Mandelbrot set. Available on Arxiv: 2401.09394. To appear.
Angelica Babei, Lea Beneish, Manami Roy, Holly Swisher, Bella Tobin, and Fang-Ting Tu. Generalized Ramanujan-Sato series arising from modular forms. In Research directions in number theory—Women in Numbers V, volume 33 of Assoc. Women Math. Ser., pages 87–131. Springer, Cham, 2024. Available on Arxiv: 2202.13253.
John Doyle, Paul Fili, Bella Tobin. Stochastic equidistribution and generalized adelic measures. Available on Arxiv: 2111.08905.