I plan to review the algorithm known as ``Coupling Into And From The
Past'' (CIAFTP) and show how it can be used for simple and
quantifiably efficient perfect sampling from perpetuity distributions,
which arise in a variety of applications. A motivating example is the
Dickman distribution, a distribution of importance in number theory,
the analysis of algorithms, and (historically) the study of unimodal
distributions.

Lecture #10810

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