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A signature invariant for knotted Klein graphs. (English) Zbl 1401.05081
Summary: We define some signature invariants for a class of knotted trivalent graphs using branched covers. We relate them to classical signatures of knots and links. Finally, we explain how to compute these invariants through the example of Kinoshita’s knotted theta graph.
MSC:
 05C10 Planar graphs; geometric and topological aspects of graph theory 57M12 Low-dimensional topology of special (e.g., branched) coverings 57M15 Relations of low-dimensional topology with graph theory 57M25 Knots and links in the $$3$$-sphere (MSC2010) 57M27 Invariants of knots and $$3$$-manifolds (MSC2010)
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