Mathematics – Probability
Scientific paper
2011-12-12
Mathematics
Probability
10 pages
Scientific paper
The well-known Gilbert-Shannon-Reeds model for riffle shuffles assumes that the cards are initially cut 'about in half' and then riffled together. We analyze a natural variant where the initial cut is biased. Extending results of Fulman (1998), we show a sharp cutoff in separation and L-infinity distances. This analysis is possible due to the close connection between shuffling and quasisymmetric functions along with some complex analysis of a generating function.
Assaf Sami
Diaconis Persi
Soundararajan Kannan
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