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Notes on the geography of the plane at infinity

Jack Morava
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Abstract

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.

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Jack Morava. 2006-10-01. Notes on the geography of the plane at infinity. https://arxiv.org/abs/math/0610048

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