21 citations · 98 across the 26 of their papers we have counts for
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math.GR2009
The Dehn function of SL(n;Z)
Robert Young
We prove that when n >= 5, the Dehn function of SL(n;Z) is quadratic. The proof involves decomposing a disc in SL(n;R)/SO(n) into triangles of varying sizes. By mapping these trian…
math.MG2009★ 6 cited
Lipschitz extensions into Jet space Carnot groups
Stefan Wenger, Robert Young
The aim of this article is to prove a Lipschitz extension theorem for partially defined Lipschitz maps to jet spaces endowed with a left-invariant sub-Riemannian Carnot-Carathéodor…
math.GR2009
A polynomial isoperimetric inequality for SL(n,Z)
Robert Young
We prove that when n>=5, the Dehn function of SL(n,Z) is at most quartic. The proof involves decomposing a disc in SL(n,R)/SO(n) into a quadratic number of loops in generalized Sie…