Abstract
We show that for any orientation-preserving self-homeomorphism a of the double torus ∑2 there exists a point p of ∑2 such that α(α(p)) = p. This answers a question raised by Jakob Nielsen in 1942. © 1096 American Mathematical Society.
Original language | English |
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Pages (from-to) | 1583-1591 |
Journal | Proceedings of the American Mathematical Society |
Volume | 124 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 Dec 1996 |