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most citedThe Kirkwood-Dirac representation associated to the Fourier transform for finite abelian groups: positivity

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math.NT2023

Convolution identities for divisor sums and modular forms

Ksenia Fedosova, Kim Klinger-Logan, Danylo Radchenko

We prove exact identities for convolution sums of divisor functions of the form where $φ(…