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math.CO2015
Bounded Degree Cosystolic Expanders of Every Dimension
Shai Evra, Tali Kaufman
In this work we present a new local to global criterion for proving a form of high dimensional expansion, which we term cosystolic expansion. Applying this criterion on Ramanujan c…
math.CO2015★ 5 cited
Finite quotients of Bruhat-Tits buildings as geometric expanders
Shai Evra
In \cite{FGLNP}, Fox, Gromov, Lafforgue, Naor and Pach, in a respond to a question of Gromov \cite{G}, constructed bounded degree geometric expanders, namely, simplical complexes h…