Definition:Cototient
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Definition
Let $n \in \Z_{>0}$ be a (strictly) positive integer.
The cototient of $n$ is defined as:
- $n - \map \phi n$
where $\map \phi n$ denotes the Euler $\phi$ function.
Also see
Linguistic Note
The word cototient derives from:
- the prefix co- denoting complement
- the word totient, which is a variant term for the Euler $\phi$ function.
The word totient is pronounced to rhyme with quotient, that is: toe-shyent or toe-shent, according to taste.
The same applies to its various relatives: nontotient, cototient, noncototient, and so on.
Sources
- Weisstein, Eric W. "Cototient." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Cototient.html