Tupper's Self-Referential Formula is an equation that when graphed, displays the formula itself.

**Update:** In computing, a quine is a program which "produces its complete source code as its only output". (thx, sam)

Tupper's Self-Referential Formula is an equation that when graphed, displays the formula itself.

**Update:** In computing, a quine is a program which "produces its complete source code as its only output". (thx, sam)