Set Notation Flashcards
What is a set?
A set is a collection of well defined and distinct objects (must have something in common).
The objects in a set are called elements.
What does the symbol “E” mean? And how do you represent it?
The symbol “E” means “is an element of”.
And you represent using curly brackets.
Separate objects using commas.
What does the symbol ∈/ mean and how can you represent it?
The symbol ∈/ mean “Is not an element of”
Represent using curly brackets { }
Seperate objects using commas.
What is a cardinal number (#)?
A cardinal number (#) = number of elements in a set.
What is a null set (ø)?
A null set (ø) is a set that contains no elements.
What is a subset (⊆)?
A subset (⊆) is a smaller set of elements within a bigger set.
How do you describe a set?
Word description = the set “F” contains the colours of the Irish flag.
How do you list elements?
Listing elements = F = {Green, White, Orange}.
