Difference between revisions of "Identity"
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| − | Let $X$ be any set. The function $\mathrm{id} \colon X \rightarrow X$ defined by $\mathrm{id}(x)=x$ is called the identity | + | Let $X$ be any set. The function $\mathrm{id} \colon X \rightarrow X$ defined by $\mathrm{id}(x)=x$ is called the identity on $X$. |
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Revision as of 23:01, 25 December 2016
Let $X$ be any set. The function $\mathrm{id} \colon X \rightarrow X$ defined by $\mathrm{id}(x)=x$ is called the identity on $X$.
Plot of $\mathrm{id}$ with $X=\mathbb{R}$.
Domain coloring of $\mathrm{id}$ with $X=\mathbb{C}$.
