Objective functions are used to optimize a system.

Trapdoor functions are widely used in cryptography.

The floor functions of the given numbers are calculated.

The ceil functions in this programming language round up a decimal number to the nearest integer.

The ceiling functions in the math textbook were challenging to understand.

The sign functions of the equation are crucial for determining its behavior.

Virtual functions are an important feature of object-oriented programming.

The Lagrangian functions are used to describe the dynamics of a system.

Theta functions are widely used in mathematics and physics.

Mimic functions are used in computer programming to imitate the behavior of other functions.