Alanna Hoyer-Leitzel

I am an Assistant Professor of Mathematics at Mount Holyoke College. Previously I was an Ed Lorenz Postdoctoral Fellow at Bowdoin College, funded by MCRN. I graduated from the University of Minnesota with my PhD in Mathematics in July 2014.

Office Hour Appointments

Link posted here soon


Dynamical Systems and applications of dynamical systems to physical problems; relative equilibria in the n-vortex problem from the perspective of Hamiltonian dynamical systems; bifurcations, tipping, and disturbance in dynamical systems, especially applications related to resilience and climate. I also know a tiny bit of computational algebraic geometry.

A gif to illustrate some of my dissertation research:

Research Statement

My advisor is Rick Moeckel.
One of my favorite collaborators is Anna Barry.
I did my postdoc with Mary Lou Zeeman.


Nichol, Kristin L., Kate Tummers, Alanna Hoyer-Leitzel, Jennifer Marsh, Matt Moynihan, and Steven McKelvey. "Modeling seasonal influenza outbreak in a closed college campus: impact of pre-season vaccination, in-season vaccination and holidays/breaks." PLoS One 5, no. 3 (2010): e9548.

Anna Barry and Alanna Hoyer-Leitzel. "Existence, Stability, and Symmetry of Relative Equilibria with a Dominant Vortex." SIAM Journal on Applied Dynamical Systems 15.4 (2016): 1783-1805.

(submitted for review) Alanna Hoyer-Leitzel, Alice Nadeau, Andrew Roberts, and Andrew Steyer. "Connections between rate-induced tipping and nonautonomous stability theory." arXiv:1702.02955

(In preparation) Katherine Meyer, Alanna Hoyer-Leitzel, Sarah Iams, Ian Klasky, Victoria Lee, Stephen Ligtenberg, Erika Bussmann, and Mary Lou Zeeman. "Quantifying resilience to recurrent ecosystem disturbances using flow-kick dynamics."

(submitted for review) Mary Lou Zeeman, Katherine Meyer, Erika Bussmann; Alanna Hoyer-Leitzel, Sarah Iams, Ian Klasky, Victoria Lee, and Stephen Ligtenberg. "Resilience of socially valued properties of natural systems to repeated disturbance: a framework to support value-laden management decisions."

Check out. . .

  • This set of cool Mathematica commands. (It is a Mathematica notebook, so right click, save/download the link, and open in Mathematica.)
  • a poem I wrote during undergrad at St. Olaf College.
  • my short-lived career as an art critic: Art and Postcards
  • One of my favorite blogs:
  • Another one of my favorite blogs:
  • A great math organization focused on climate change research: MCRN
  • One of my best friends from grad school - her blog is here: Social Mathematics

  • My amazing multivariable calculus class graphing the surface z2=x2+y2


    Twitter and Instagram

    403 Clapp Lab
    Department of Mathematics and Statistics
    Mount Holyoke College
    50 College Street
    South Hadley, MA 01075
    (413) 538-2720
    ahoyerle at mtholyoke dot edu