Mathematical notation of mutually exclusive events Which is the formal mathematical notation that the following sentence can be stated?
"Let the mutually exclusive events $A_1,A_2,\ldots,A_n$"

It really depends on what you want to express, do you want to describe that the events are mutually intersection free, then write it as Dan Brumleve suggests as
$$
\forall i, j: 1 \le i \lt j \le n \implies A_i \cap A_j = \emptyset
$$
if you want to express that the sets (events) are indeed mutually independent to some probability measure, then you might be better off with
$$\forall i, j: A_i \perp_{i\neq j} A_j$$
Keep in mind, that both statements are not equivalent.
