Mathematical structure

In mathematics, a structure on a set (or on some sets) refers to providing or endowing it (or them) with certain additional features (e.g. an operation, relation, metric, or topology). Τhe additional features are attached or related to the set (or to the sets), so as to provide it (or them) with some additional meaning or significance.

Extends: [Mathematical structures](https://wikipedia.org.ai/Mathematical structures), [Set theory](https://wikipedia.org.ai/Set theory), [Type theory](https://wikipedia.org.ai/Type theory)