$Pin$-structures on surfaces and quadratic forms

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A correspondence between different $Pin$-type structures on a compact surface and quadratic (linear) forms on its homology is constructed. Addition of structures is defined and expressed in terms of these quadratic forms.
5 pages, AMS-TeX, no Figures

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Differential Geometry

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http://salesiana.dossiersoluciones.com/handle/123456789/152062

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/dg-ga/9507002
 http://arxiv.org/abs/dg-ga/9507002

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arXiv