The add function above may also be defined using the following pattern.

The behavior of class or its instances is defined using methods.

The official constellation boundaries were defined in 1930 using B1875.0.

Some important classes defined using polynomial time are the following.

The intersection of line and can be defined using determinants.

Many complexity classes are defined using the concept of a reduction.

A Poisson point process can also be defined using these two properties.

A kilometer is also defined using the planet Earth as a standard of distance.

The border between these is sometimes defined using a circle of confusion criterion.

Operators can be defined using the form of function declarations.