Set Operations
-
B Ì A (B is a subset
of A) if every element of B is an element of A. Equivalently
A É B (A is a superset
of B)
-
A Ç B = {x | x
Î A Ù
x Î B } -- intersection of
A and B
-
A È B = {x | x
Î A Ú
x Î B } -- union of A and
B
-
If A Ì X , AC
= X \ A = { x | x Î
X, x Ï A } -- complement
of A in X
