Definition:Function Symbol

Definition

Let $\LL$ be a formal language (for example, the language of predicate logic $\LL_1$).

A function symbol is a letter of $\LL$ used to describe a function.

The name function symbol is a gesture to the reader to make clear what such a symbol should (intuitively) represent in the formal language $\LL$.

Also see

• Definition:Symbol
• Definition:Constant Symbol
• Definition:Predicate Symbol
• Definition:Signature for Predicate Logic

Sources

• 2009: Kenneth Kunen: The Foundations of Mathematics ... (previous) ... (next): $\mathrm{II}.5$ First-Order Logic Syntax: Definition $\mathrm{II.5.2}$