Shuffling Cards When You Are of Very Little Brain: Low Memory Generation of Permutations
- LRM
Main:34 Pages
4 Figures
Bibliography:3 Pages
Appendix:2 Pages
Abstract
How can we generate a permutation of the numbers through so that it is hard to guess the next element given the history so far? The twist is that the generator of the permutation (the ``Dealer") has limited memory, while the ``Guesser" has unlimited memory. With unbounded memory (actually bits suffice), the Dealer can generate a truly random permutation where~ is the expected number of correct guesses.
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