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The Best (and Worst) Ways to Shuffle Cards - Numberphile
Numberphile

Persi Diaconis explains on Numberphile the mathematics of card shuffling, including why seven riffle shuffles are needed to randomize a deck and how different shuffles compare.
HN points to it as a good, anecdote-filled introduction to the math of shuffling from the expert himself.
4 Hacker News mentions · 2015–2026