The probability of event A and event B happening at the same time is expressed as P(A & B). For independent events A and B, P(A & B)=P(A)P(B). P(A & B) is also known as the probability of intersection of events A and B, from the Venn diagram description

Julia set

The set of all the points for a function of the form Z^{2}+C. The iterations will either approach zero, approach infinity, or get trapped