venn diagrams notation

ξ

universal set - all the numbers used in the entire diagram

∅

empty set - nothing in it

A

everything in A

A’

not in A

B

everything in B

B’

not in B

A∩B

intersection of A and B

(A∩B)’

not in the intersection

AUB

union of A and B, anything in both of them

(AUB)’

everything not in the union of A and B

AUB’

everything in A or not in B

(AUC)’U(A∩B∩C’)

everything not in A or C, or in the intersection of A and B