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Symmetry characterizations of certain distributions, 1

Published online by Cambridge University Press:  24 October 2008

Martin Baxter  and
David Williams
Martin Baxter
Affiliation:
Statistical Laboratory, University of Cambridge, Cambridge CB2 1SB
David Williams
Affiliation:
Statistical Laboratory, University of Cambridge, Cambridge CB2 1SB
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Extract

Certain interesting distributions are characterized by two or more symmetry properties, and it is a challenge to link these properties in an effective way. Dynkin's advice Discuss the simplest case first is always the best, and here we follow it (and avoid technical jargon) by discussing in detail just one concrete example, which concerns a discounted version of the arc-sine law. Theorem 1 B gives the symmetry properties for this case, and Theorem 1 A shows how they may be exploited to obtain an asymptotic result which we find rather surprising. Section 5 points to one of the generalizations which we shall examine in a sequel, and describes the natural formulation of the strange symmetry property which we first meet at (16b). (The sequel will be in many ways very different from this paper, but will share with it the fact that its results are not those which we originally conjectured.) In Sections 6 and 7 we consider some of the bizarre numerical analysis associated with the current problem.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 111 , Issue 2 , March 1992 , pp. 387 - 397
Copyright
Copyright © Cambridge Philosophical Society 1992

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References

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