Identity Element
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High Quality Content by WIKIPEDIA articles! In mathematics, an identity element (or neutral element) is a special type of element of a set with respect to a binary operation on that set. It leaves other elements unchanged when combined with them. This is used for groups and related concepts. The term identity element is often shortened to identity (as will be done in this article) when there is no possibility of confusion. Let (S, ) be a set S with a binary operation on it (known as a magma). Then an element e of S is called a left identity if e a = a for all a in S, and a right identity if a…mehr

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High Quality Content by WIKIPEDIA articles! In mathematics, an identity element (or neutral element) is a special type of element of a set with respect to a binary operation on that set. It leaves other elements unchanged when combined with them. This is used for groups and related concepts. The term identity element is often shortened to identity (as will be done in this article) when there is no possibility of confusion. Let (S, ) be a set S with a binary operation on it (known as a magma). Then an element e of S is called a left identity if e a = a for all a in S, and a right identity if a e = a for all a in S. If e is both a left identity and a right identity, then it is called a two-sided identity, or simply an identity. An identity with respect to addition is called an additive identity (often denoted as 0) and an identity with respect to multiplication is called a multiplicative identity (often denoted as 1).