I'm a theoretical neuroscientist, with a background in pure mathematics. I'm currently a Swartz fellow at Harvard University in the Center for Brain Science.


  • Probing variability in a cognitive map using manifold inference from neural dynamics
  • Ryan J Low*, Sam Lewallen*, Dmitriy Aronov, Rhino Nevers, David W Tank (2018). bioRxiv.
  • A map-like micro-organization of grid cells in the medial entorhinal cortex
  • Yi Gu, Sam Lewallen, Amina A Kinkhabwala, Cristina Domnisoru, Kijung Yoon, Jeffrey L Gauthier, Ila R Fiete, David W Tank (2018). Cell.
  • Grid cell responses in 1D environments assessed as slices through a 2D lattice
  • KiJung Yoon*, Sam Lewallen*, Amina A Kinkhabwala, David W Tank, Ila R Fiete (2016). Neuron.
  • Stimulus-dependent correlations in threshold-crossing spiking neurons
  • Yoram Burak, Sam Lewallen, Haim Sompolinsky (2009). Neural Computation.
  • (1,1) L-space knots
  • Joshua Evan Greene, Sam Lewallen, Faramarz Vafaee** (2018). Compositio Mathematica.
  • Strong L-spaces and left orderability
  • Adam Simon Levine, Sam Lewallen** (2012). Mathematical Research Letters.

* Joint first authors
** Authors in alphabetical order


  • Floergåsbord
  • Phd thesis in Mathematics, Princeton University
  • The volume conjecture
  • Undergraduate thesis in Mathematics, Harvard University