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A Gilbreath shuffle is a way to shuffle a deck of cards, named after mathematician Norman L. Gilbreath (also known for Gilbreath's conjecture). Gilbreath's principle describes the properties of a deck that are preserved by this type of shuffle, and a Gilbreath permutation is a permutation that can be formed by a Gilbreath shuffle.〔.〕 ==Description== A Gilbreath shuffle consists of the following two steps:〔 *Deal off any number of the cards from the top of the deck onto a new pile of cards. *Riffle the new pile with the remainder of the deck. It differs from the more commonly used procedure of cutting a deck into two piles and then riffling the piles, in that the first step of dealing off cards reverses the order of the cards in the new pile, whereas cutting the deck would preserve this order. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gilbreath shuffle」の詳細全文を読む スポンサード リンク
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