A star being eclipsed, where the changes in brightness are from perspective, are called extrinsic variables.

Stars whose brightness actually changes are called intrinsic variables.

Real-world problems are modeled in this framework by a network of interrelated entities, called variables.

Some, called optically violent variables, brightened and dimmed in as little as a day.

They may also be called simply syntactic variables.

Variables have scope in the language, and are called local variables.

Parameters locally defined within the predicate are called variables.

Letters so employed in mathematics and logic are called variables.

In general, binary systems with a white dwarf accreting matter from a stellar companion are called cataclysmic variables.

Sometimes random elements with values in are called -valued random variables.