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arXiv · 1802.05557

The Gauss-Bonnet Theorem for coherent tangent bundles over surfaces with boundary and its applications

Wojciech Domitrz·Michał Zwierzyński
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Abstract

In [31,32,33] the Gauss-Bonnet formulas for coherent tangent bundles over compact oriented surfaces (without boundary) were proved. We establish the Gauss-Bonnet theorem for coherent tangent bundles over compact oriented surfaces with boundary. We apply this theorem to investigate global properties of maps between surfaces with boundary. As a corollary of our results we obtain Fukuda-Ishikawa's theorem. We also study geometry of the affine extended wave fronts for planar closed non singular hedgehogs (rosettes). In particular, we find a link between the total geodesic curvature on the boundary and the total singular curvature of the affine extended wave front, which leads to a relation of integrals of functions of the width of a resette.

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Wojciech Domitrz, Michał Zwierzyński. 2018-02-21. The Gauss-Bonnet Theorem for coherent tangent bundles over surfaces with boundary and its applications. https://doi.org/10.1007/s12220-019-00197-0

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