A collection of distinct objects.

What is the cardinality of an empty set?

The set of all possible subsets of a given set.

An arrangement of objects in a specific order.

A natural number greater than 1 that has no positive divisors other than 1 and itself.

A relation that is reflexive, antisymmetric, and transitive.

A function that calls itself during its execution.

A graph that can be drawn on a plane without any edges intersecting.

A matrix representation of a graph using 0s and 1s to indicate the presence or absence of edges.

A branch of logic that deals with the logical relationships between propositions.