A new construction of counterexamples to the bounded orbit conjecture

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Authors: Jiehua Mai, Enhui Shi, Kesong Yan, Fanping Zeng
Cited by: 0

Abstract

The bounded orbit conjecture says that every homeomorphism on the plane with each of its orbits being bounded must have a fixed point. Brouwer's translation theorem asserts that the conjecture is true for orientation preserving homeomorphisms, but Boyles' counterexample shows that it is false for the orientation reversing case. In this paper, we give a more comprehensible construction of counterexamples to the conjecture. Roughly speaking, we construct an orientation reversing homeomorphisms $f$ on the square $J^2=[-1, 1]^2$ with $\omega(x, f)=\{(-1, 1), (1, 1)\}$ and $\alpha(x, f)=\{(-1, -1), (1, -1)\}$ for each $x\in (-1, 1)^2$. Then, by a semi-conjugacy defined by pushing an appropriate part of $\partial J^2$ into $(-1, 1)^2$, $f$ induces a homeomorphism on the plane, which is a counterexample.

Fields of Study & Subjects

Advanced Differential Equations and Dynamical Systems Point processes and geometric inequalities Mathematics and Applications

Publication details

Journal / source
Topological Methods in Nonlinear Analysis
Pages
1–10
Publication date
28 June 2026
Language
EN