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Almost periodic homeomorphisms of<i>E</i><sup>2</sup>are periodic
In this paper we show that every almost periodic homeomorphism of the plane onto itself must be periodic.This improves well-known results.LEMMA 4.2.Let B t and B 2 be 2-cells in E 2 such that B x £ B°2.Let h\B 2 ^»B 2 be a homeomorphism such that