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First-order local invariants of stable maps from 3-manifolds to \(\mathbb R^{3}\). (English) Zbl 1266.57018

The authors study Vassiliev type invariants of stable maps from 3-manifolds to \(\mathbb R^3\). These invariants are locally constant functions on the space of stable maps. The idea of Vassiliev invariants is to relate these functions with the topology of the discriminant set. The authors describe the codimension 1 and codimension 2 degenerations of (multi-) germs from 3-dimensions to 3-dimensions, and hence obtain a complete set of generators for first order Vassiliev invariants. Two of these invariants are related to monosingularities, one to a multisingularity, and one to the Euler charactersitic of a branch set. The authors also describe interesting relations to first order Vassiliev invariants of maps from 2-dimension to 3-dimension (found by Goryunov).

MSC:

57R45 Singularities of differentiable mappings in differential topology
58K65 Topological invariants on manifolds

References:

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