The space of closed subgroups of R2 and Seifert invariants

Benoît Kloeckner – GJM, Volume 1, Issue 1 (2016), 54–58.

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In this note we give a version of the proof of the Hubbard-Pourezza Theorem, introduced below, using Seifert fibration. Our main goal is to compute explicitely and directly Seifert invariants in this nice example. The fact that it is fairly hard to find such a direct computation in the litterature is our main motivation.

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Received: January 2016
Published online: June 2016

Authors:

Benoit Kloeckner
Université Paris-Est,
Laboratoire d'Analyse et de Mathématiques Appliquées
(UMR 8050), UPEM, UPEC, CNRS, F-94010,
Créteil, France

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