Set symbols of set theory and probability with name and definition. Objects that belong to A or B but not to their intersection. A B if A then B or A implies B A B if B then A or B implies A A B A if and only if B or A is equivalent to B TFAE The Following Are Equivalent QED.
In other words A B is an identity if A and B define the same functions and an identity is an equality between functions that.
A then a picture that looked like a sun B. A set is a collection of things usually numbers. No set membership. A p r 2 infinity is endless equals.