An out shuffle is a type of perfect shuffle done in two steps:

After eight perfect shuffles, the deck comes back exactly to its starting order.

The better the dance the more likely the female will want to mate, with success guaranteed if the male can exhibit a perfect shuffle.

Now suppose I make a perfect shuffle - divide the pack into equal parts and interleaf the cards one by one.

Suppose I make two perfect shuffles with a new pack.

In mathematics, a perfect shuffle can be considered to be an element of the symmetric group.

In the meantime, he also worked on "perfect shuffles," those that exactly interlace the cards.

A perfect shuffle is far from the perfect way for getting cards in random order for a card game.

Luckily for the average bridge or poker player, a perfect shuffle is something only a practiced sleight-of-hand artist can do reliably.

In S, the perfect shuffle is the permutation that splits the set into 2 piles and interleaves them.