56 citations · 130 across the 13 of their papers we have counts for
Showing 2014 · math.GTShow all
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math.GT2014
3-manifolds that can be made acyclic
Stefan Friedl, Matthias Nagel
We determine which 3-manifolds admit a unitary representation such that the corresponding twisted chain complex is acyclic.
math.GT2014
A specious unlinking strategy
Stefan Friedl, Matthias Nagel, Mark Powell
We show that the following unlinking strategy does not always yield an optimal sequence of crossing changes: first split the link with the minimal number of crossing changes, and t…
math.GT2014★ 8 cited
Minimal genus in circle bundles over 3-manifolds
Matthias Nagel
An estimate for the genus function in circle bundles over irreducible 3-manifolds is proven. This estimate is in many cases an equality and it relates the minimal genus of the surf…