Lehman Garrison

Software Engineer
Scientific Computing Core
Flatiron Institute

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About Me

Hello! I'm Lehman, a software engineer at the Flatiron Institute's Scientific Computing Core. Before that, I received my Ph.D. under Daniel Eisenstein at the Center for Astrophysics | Harvard & Smithsonian. My main research projects were on high-performance cosmological $N$-body simulations and the formation and statistics of large-scale structure. My general research interests include cosmology and high-performance computing.

During my Ph.D. and postdoc, I was the lead developer of the Abacus cosmological $N$-body code, which I worked on with Daniel Eisenstein and Nina Maksimova. I continue to support that project and some smaller ones, like Corrfunc, which I develop with Manodeep Sinha.



Ph.D. Thesis

Publications on Google Scholar

AbacusSummit Simulation Suite

AbacusCosmos Simulation Suite

Halo Visualization Gallery

$\sigma_8$ in Power-Law Cosmologies

A note on the RR term in autocorrelations

High-Performance Python, or When to Write For Loops in Python