Idempotence

Revision as of 18:36, 19 September 2008 by Herefishyfishy1 (talk | contribs) (New page: A function <math>f</math> is idempotent if <math>f(x)=f(f(x))</math>. == Examples == * Any constant function is idempotent. * The function <math>f(x)=x</math> is idempotent. * The [[signu...)
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A function $f$ is idempotent if $f(x)=f(f(x))$.

Examples