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Published online by Cambridge University Press: 24 October 2008
Suppose I is a bounded plane continuum whose complement is a single domain (I) and that
is a (1–1) bicontinuous transformation of the plane onto itself which leaves I invariant. Cartwright and Littlewood(1) have proved the following theorem:
Theorem A. Suppose that(I) has no prime end fixed under
and the frontier of I contains a fixed point P. If
is any prime end of
(I) containing P, and C is any curve in
(I) converging to
such that PeC¯, the closure of C, then for some‡ integer N the continuum I(FN) consisting of
together with the sum B(FN) of its interior complementary domains contains all fixed points in I.