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math.GT1997
Isospectrality and 3-manifold groups
Daniel Ruberman
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…
dg-ga1997
Mutation and Gauge Theory I: Yang-Mills Invariants
Daniel Ruberman
Mutation is an operation on 3-manifolds containing an embedded surface of genus 2. It is defined by cutting along the surface and regluing using the `hyperelliptic' involution, and…