Mathematics – Group Theory
Scientific paper
2010-06-08
Mathematics
Group Theory
15 pages
Scientific paper
We use intersections with horizontal manifolds to show that high-dimensional
cycles in the Heisenberg group can be approximated efficiently by simplicial
cycles. This lets us calculate all of the higher-order Dehn functions of the
Heisenberg groups. By applying a similar technique to general nilpotent Lie
groups with lattices, we recover a Sobolev inequality of Varopoulos.
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