Trull (cards) Trull (cards) The trull is a trio of three special trump cards used in Tarock games in Austria and other countries that have a much higher card value than the other trumps. The individual cards are known as trull cards ("Trullstücke"). The word "trull" is derived from the French "tous les trois" which means "all three". In spite of its French roots the term is not common in the game of French tarot, where the trull cards are called "les bouts" ("butts") or, in earlier times, "les oudlers", which has no other meaning. The games of the tarot (French) or
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