Mathematics – Geometric Topology
Scientific paper
1997-12-08
Mathematics
Geometric Topology
AMS-LaTeX, 5 pages
Scientific paper
The relationship between the Chern-Simons invariant and eta-invariant of a
3-manifold is shown to lead to an obstruction to a group being the fundamental
group of a closed oriented 3-manifold. The proof uses Sunada's construction of
isospectral manifolds as covering spaces over a common base space.
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