# Tutorial: Enumerated sets¶

## Exercice: Poker and probability¶

A poker card is characterized by a suit (“spades”, “hearts”, “diamonds”, “clubs”) and a rank ($$2, 3, \dots, 9$$, “Jack”, “Queen”, “King” and “Ace”). Here is the way to define suits in sage:

sage: Suits = Set(["spades", "hearts", "diamonds", "clubs"])


Define similarly the set Ranks:

sage: # edit here


The deck of card is the cartesian product of the set of suits by the set of ranks. Define a set Cards accordingly:

sage: # edit here


Use the method .cardinality() to compute the number of suits, ranks and cards:

sage: # edit here

sage: # edit here

sage: # edit here


Draw a card at random:

sage: # edit here


Cards are (currently) returned as lists. To be able to build a set of cards, we need them to be hashable. Let’s redefine the set of cards by transforming cards to tuples:

sage: Cards = CartesianProduct(Suits, Ranks).map(tuple)


Use Subsets to draw a hand of five cards at random:

sage: # edit here


Use .cardinality() to compute the number of hands, check the result with binomial:

sage: # edit here


To go further, see exercises 38, 39, 40 in Calcul Mathématique avec Sage (version 1.0) page 255.

## Using existing Enumerated Sets¶

1. List all the strict partitions of $$5$$ (hint: use Partitions with max_slope):

sage: # edit here

2. List all the vectors of 0 and 1 of length 5 (hint: use IntegerVectors with max_part):

sage: # edit here


You can also use a cartesian product:

sage: # edit here

3. List all the Dyck words of length 6:

sage: # edit here


Here is the way to print the standard tableaux of size $4$:

sage: for t in StandardTableaux(3): t.pp(); print
1  2  3

1  3
2

1  2
3

1
2
3

1. Define the set of all the partitions of $$1$$ to $$5$$ (hint: use DisjointUnionEnumeratedSets):

sage: # edit here