High Quality Content by WIKIPEDIA articles!In mathematics, the multiplicity of a member of a multiset is how many memberships in the multiset it has. For example, the term is used to refer to the number of times a given polynomial equation has a root at a given point. The common reason to consider notions of multiplicity is to count correctly, without specifying exceptions (for example, double roots counted twice). Hence the expression counted with (sometimes implicit) multiplicity. When mathematicians wish to ignore multiplicity they will refer to the number of distinct elements of a set.

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