Definition:Binary Operation/Also known as

Binary Operation: Also known as
Some authors use the term (binary) composition or law of composition for (binary) operation.

Some sources refer to a binary operation just as an operation.

Most authors use $\circ$ for composition of relations (which, if you think about it, is itself an operation) as well as for a general operation.

To avoid confusion, some authors use $\bullet$ for composition of relations to avoid ambiguity.

uses $\bigtriangleup$ and $\bigtriangledown$ for the general binary operation, which has the advantage that they are unlikely to be confused with anything else in this context.

uses $\intercal$, and calls it truc, French for trick or technique:


 * The symbol $\intercal$ is called truc ("trook") and is French for "thingummyjig"! The idea it conveys is that what we call our law of composition does not matter, for what we are really interested in are sets of objects and mappings between them.