characteristic of a ring

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Formal Definition

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If for a ring $R$ a positive integer $n$ exists such that $n*a=0$ for all $a \in R$, then the least such positive integer is the characteristic of the ring $R$. If no such positive integer exists, then $R$ is of characteristic $0$.

Informal Definition

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Example(s)

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Non-example(s)

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Additional Comments

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