Wiki Conventions

This page lists conventions that serve towards internal consistency in this wiki.
* Set: denoted by the letter S, as S
* Define mathematical concepts ideally on metric spaces. This seems general enough to include most econ purposes I run into while not unnecessarily complicating things by defining on topological spaces. [NO, NOT GENERAL ENOUGH], do all definitions on Euclidean, metric, and topological spaces? Is that a sensible way to categorize things?
*Denote events by A and B, and random variables by X and Y. Note: event is a set of outcomes of an experiment (subset of sample space), to which a probability is assigned. Denote outcomes by a, b maybe? Hence, if some event A is defined by three outcomes, a, b, c, then A = {a, b, c}. 
*Denote the probability space as \Omega for the sample space, something like\mathcal{F} for the sigma algebra of events, and something for probability (maybe P, \mathbb{P}, \Pr, \mathcal{P})
*Add a 'Motivation' heading at a page. Why is this important? What is its use?