Notes on the geography of the plane at infinity

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The second relative homotopy group π_2(V(\C),V(\R)) (of the complex relative to the real points of an algebraic variety) encodes interesting information about the `bubbling' phenomena of quantum cohomology. We consider these groups in particular for genus zero Deligne-Mumford moduli spaces, as well as for certain generalizations introduced more recently by Manin and Losev.
An attempt to encode bubbling into the fundamental group(oid)

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Quantum Algebra, Algebraic Geometry, 14N35,18D50,55P48

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http://salesiana.dossiersoluciones.com/handle/123456789/117781

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0610048
 http://arxiv.org/abs/math/0610048

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arXiv