Pack of Cards is Randomized by 7 Riffle Shuffles

Theorem

A pack of cards is randomized by $7$ riffle shuffles.

Proof

This theorem requires a proof. In particular: Background work needed. You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by crafting such a proof. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{ProofWanted}} from the code. If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page.

Sources

• 1992: Dave Bayer and Persi Diaconis: Trailing the Dovetail Shuffle to its Lair (Ann. Appl. Probab. Vol. 2: pp. 294 – 313)  www.jstor.org/stable/2959752

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $7$