DirichletConvolution
P43789
predicate
Indicates that two arithmetic functions are combined into a new function by summing the products of their values over all pairs of positive integers whose product equals a given integer.
Sample triples (2)
| Subject | Object |
|---|---|
| Euler’s totient function φ(n) | φ * 1 = id where id(n) = n ⓘ |
| Euler’s totient function φ(n) | φ = μ * id where μ is the Möbius function ⓘ |