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math.GR2009
Exponential higher dimensional isoperimetric inequalities for some arithmetic groups
Kevin Wortman
We show that arithmetic subgroups of semisimple groups of relative Q-type A_n, B_n, C_n, D_n, E_6, or E_7 have an exponential lower bound to their isoperimetric inequality in the d…
cs.DS2009★ 1 cited
Optimal Embedding Into Star Metrics
David Eppstein, Kevin A. Wortman
We present an O(n^3 log^2 n)-time algorithm for the following problem: given a finite metric space X, create a star-topology network with the points of X as its leaves, such that t…