# Definition:f

The LaTeX DLMF and DRMF macro \f represents Function.

This macro is in the category of polynomials.

In math mode, this macro can be called in the following ways:

\f{f} produces ${\displaystyle{\displaystyle{\displaystyle{f}}}}$
\f{f}@{x} produces ${\displaystyle{\displaystyle{\displaystyle{f}\!\left(x\right)}}}$

These are defined by

Then for ${\displaystyle{\displaystyle\alpha,\beta>-1}}$, we have the orthogonality relation