The main political variable in the coming weeks, though, appears to be the behavior of the economy.

The fourth variable is energy, and there appear to be two issues here.

What variables appear to affect the amount of social power an individual acquires?

An axiom schema is a formula in the language of an axiomatic system, in which one or more schematic variables appear.

However, other previously unconsidered variables appear to play important roles.

The distinction between these is not always clear cut, and it frequently depends on the context in which the variables appear.

In this example, data in working memory is structured and variables appear between angle brackets.

Such a BDD is called 'ordered' if different variables appear in the same order on all paths from the root.

Note that, although the variables do not appear explicitly in the above formula, they enter in through the values.

All variables thus far appear to have benefited the Enemy.