Jacob's ladder surface
In mathematics, Jacob's ladder is a surface with infinite genus and two ends. It was named after Jacob's ladder by Étienne Ghys (1995, Théorème A), because the surface can be constructed as the boundary of a ladder that is infinitely long in both directions.
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- Ghys, Étienne (1995), "Topologie des feuilles génériques", Annals of Mathematics. Second Series, 141 (2): 387–422, doi:10.2307/2118526, ISSN 0003-486X, MR 1324140
- Walczak, Paweł (2004), Dynamics of foliations, groups and pseudogroups, Instytut Matematyczny Polskiej Akademii Nauk. Monografie Matematyczne (New Series) [Mathematics Institute of the Polish Academy of Sciences. Mathematical Monographs (New Series)], 64, Birkhäuser Verlag, ISBN 978-3-7643-7091-6, MR 2056374