Maths Dictionary · SS 1
Set
Simple meaning
A collection of things (elements), written inside curly brackets { }.
Example
The set of even numbers less than 10 = {2, 4, 6, 8}.
See it
From the Set Notation lesson. Try moving things around.
ξ = {1, 2, …, 8}
A = {x : x ≤ 4}
B = {x : x is 3, 4 or 5}
A∩B = {3, 4}n(A∩B) = 2