Talk:Dirichlet convolution

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Explain why its a Dirichlet ring, and not a field_(mathematics). Naively, it seems to have additive and multiplicative units and inverses. linas 05:00, 6 Jan 2005 (UTC)

Because only arithmetic functions for which f(1) is not 0 have inverses. I have clarified this in the article. Gandalf61 10:25, May 21, 2005 (UTC)

Weak multiplicative functions

Where do these come from? Are they the same as multiplicative (in the number-theoretic sense)? Richard Pinch (talk) 21:45, 3 September 2008 (UTC)[reply]