# Maths ~ Sets

Flashcards by jennycazabon, updated more than 1 year ago
 Created by jennycazabon over 7 years ago
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### Description

Maths ~ Sets Flashcards on Maths ~ Sets, created by jennycazabon on 18/10/2013.

## Resource summary

 Question Answer Sets A set is a collection of well defined objects. The objects in the sets are called elements # ? #=cardinal number . Cardinal number is the umber of elements in a set ! Fact Elements can not be repeated How are sets opened and closed ? Sets are opened with a curly bracket { and closed with a curly bracket } Null set ? Has no elements written like {} Fact Null set and the set itself are always a subset Improper subset If one set has all the same elements of another Proper subset If one set is a subset of another set but does not have all the same elements as the set Union & intersection Union is what are in all the sets Instersection is what is in both sets only Venn diagrams ? Are used to represent sets Universal set? Is the rectangle that the sets are sometimes in ! This rectangle and the area of it Is known as the universal set Complement Every thing outside that set Elements ? Subset? Equal to E with a line is not an element E is an element of C with a line is not a subset of C is a subset of = with a line is not equal to = is equal to

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