# Difference between revisions of "Associative ring"

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+ | {{non-associative ring property}} | ||

==Definition== | ==Definition== | ||

## Latest revision as of 18:10, 3 March 2010

This article defines a non-associative ring property: a property that an be evaluated to true or false for any non-associative ring.

View other non-associative ring properties

## Definition

An **associative ring**, sometimes termed a **ring**, is a set equipped with the following operations:

- An infix binary operation , called
*addition*. - A prefix unary operation , called the
*negative*. - A constant element , called
*zero*. - A binary operation , called the
*multiplication*.

satisfying the following compatibility conditions:

- forms an abelian group with group operation , inverse operation , and identity element .
- satisfies the two distributivity laws:
- Associativity:

However, in many contexts, it is useful to study the situation where is possibly non-associative, i.e., we want to remove the last condition from the definition. We use the term non-associative ring for a ring that is not necessarily associative. Note that associative rings are *non-associative rings* by this definition.

A unital ring or unitary ring is a ring with an identity for multiplication, denoted . A commutative ring is a ring where the multiplication is commutative. A commutative unital ring is a ring where the multiplication is both commutative and has a unit.