finite set
countable number of elements
infinite set
uncountable number of elements
universal set
contains all available elements
empty or null set
contains no elements
equal sets
contains the exact same elements
when an element in A is also an element in B, it is a…
subset
when an element in A is also an element in B, but A is not equal to B, it is a…
proper subset
set of elements which belong to both A and B
intersections
set of elements which belong to A or B or both
union