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The twisted Alexander polynomial for finite abelian covers over three manifolds with boundary
Reidemeister torsion:Twisted Alexander polynomial:branched cover:links:Homology orientation
2011/9/13
Abstract: We consider a sign--determined Reidemeister torsion with multivariables for three manifolds with boundary. This invariant is often called the twisted Alexander polynomial when we consider li...
To a rational homology sphere graph manifold one can associate a weighted tree invariant called splice diagram. It was shown earlier that the splice diagram determines the universal abelian cover of ...
Isomorphisms of cyclic abelian covers of symmetric digraphs II
voltage assignment covering digraph enumeration isomorphism
2009/1/9
Let D be a connected symmetric digraph, ¡ a group of automorphisms of D,
and A a finite abelian group with some specified property. We give an algebraic
characterization for two A-covers of D ...