a set that is closed, associative, has an identity element and every element has an inverse

relating to or having ability to think in or work with numbers

statistically possible though highly improbable

characterized by the exactness or precision of mathematics

any number of entities (members) considered as a unit

arrange into a group or groups

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

a set that is closed, associative, has an identity element and every element has an inverse