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References to 'arithmetic function'
1. additive function by Wkbj79
2. alternate proof of M\"obius inversion formula by rm50
3. arithmetic functions form a ring by rm50
4. convolution inverses for arithmetic functions by Wkbj79
5. Dirichlet hyperbola method by Wkbj79
6. divisor sum of an arithmetic function by azdbacks4234
7. elementary results about multiplicative functions and convolution by Wkbj79
8. examples of groups by AxelBoldt
9. examples of simple recurrence relations by PrimeFan
10. importance of primitive recursion by CWoo
11. multiplicative function by Wkbj79
12. non-multiplicative function by Mathprof
13. pointwise multiplication of a completely multiplicative function distibutes over convolution by Wkbj79
14. prime difference function by XJamRastafire
15. primitive recursive function by CWoo
16. Ramanujan tau function by Wkbj79
17. recursive function is URM-computable by CWoo