There are many onto functions in mathematics.

An onto function is a surjection.

Surjective functions are important in mathematics.

The surjective function maps every element in the domain to a unique element in the codomain.

I used an anonymous function to sort the list.

The inclusion functions are essential for data analysis.

Iterated function systems are used in fractal geometry.

Anonymous functions are commonly used in functional programming languages.

The Langevin functions are widely used in statistical physics.

The sink functions in the kitchen are clogged.