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RIGIDITY OF CONTINUOUS COBOUNDARIES
Published online by Cambridge University Press: 01 September 1997
Abstract
We consider the functional equation F∘T−F=f, where T is a measure-preserving transformation and f is a continuous function. We show that if there is an L∞ function F which satisfies this equation, then F is constrained to satisfy a number of regularity conditions, and, in particular, if T is a one-sided Bernoulli shift, then we show that there is a continuous function F satisfying this equation. We show that this is not the case for the two-sided shift.
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- © The London Mathematical Society 1997
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