Torsion Invariants of Combed 3-Manifolds with Boundary Pattern and Legendrian Links

Riccardo Benedetti; Carlo Petronio

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Torsion Invariants of Combed 3-Manifolds with Boundary Pattern and Legendrian Links

Riccardo Benedetti·Carlo Petronio

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Abstract

We extend Turaev's definition of torsion invariants of 3-dimensional manifolds equipped with non-singular vector fields, by allowing (suitable) tangency circles to the boundary, and manifolds with non-zero Euler characteristic. We show that these invariants apply in particular to (the exterior of) Legendrian links in contact 3-manifolds. Our approach uses a combinatorial encoding of vector fields, based on standard spines. In this paper we extend this encoding from closed manifolds to manifolds with boundary.

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BibTeX RIS

Riccardo Benedetti, Carlo Petronio. 1998-09-25. Torsion Invariants of Combed 3-Manifolds with Boundary Pattern and Legendrian Links. https://arxiv.org/abs/math/9809148

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