Screw (card game) play any single card or set (two of a kind, three of a kind, etc.) from their hand onto the table. They must then draw as many cards as it takes from the draw deck to return to a five card hand in order to end their turn. Play: Play continues clockwise. The next person may now play a card equal to or higher in value than the last played. Multiple cards may be played at a time as long as they are the same value. If a player is unable to play a card, they must take the entire
Partition of a set into the connected components of the subgraph formed by the given set of edges. In this way, the lattice of partitions corresponds to the lattice of flats of the graphic matroid of the complete graph. Another example illustrates the refining of partitions from the perspective of equivalence relations. If "D" is the set of cards in a standard 52-card deck, the "same-color-as" relation on "D" – which can be denoted ~ – has two equivalence classes: the sets {red cards} and {black cards}. The 2-part partition corresponding to ~ has a refinement that yields the "same-suit-as" relation ~, which has