Flashcards
Sets
Flashcards do conjunto (5)
- 1A set is a collection of well-defined objects. The objects in the set are called elements.The cardinal number of a set A is the number of elements and is denoted by #A or | A | .
- 2If a set has no elements, then it is called the null set it the empty set. It Is denoted by the symbol ø or { } .Two sets are equal if they each have the same elements.
- 3If all the elements of a set A are also in a set B, then we say that A is a subset of B..If A is a subset of B and A contains all of the elements of B, then A is an improper subset of B. If A is a subset of B but A does not contain all the elements of B then A is a proper subset of B.
The null set and the set A itself are both subsets of A. - 4The universal set is the set that contains all elements. Every set is a subset of the universal set.The union of two sets is the set of elements contained in either set.
- 5The intersection
Informações
- Descrição
- FlashCards sobre Sets, criado por Fergus Earley em 06-02-2017.
- Criado por
- Fergus Earley
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