David Savitt

@dsavitt

Math department chair at Johns Hopkins University and a director of Canada/USA Mathcamp.

Baltimore, MD

Joined September 2008

268Following

808Followers

David Savitt@dsavitt · Jul 23

I should add here, Dedekind sums have been making a comeback, e.g. in the work of @samit_dasgupta and others on Stark-Heegner points. (Or maybe I'm wrong that they'd slipped out of fashion?)

DDavid Savitt@dsavitt · Jul 23

Dedekend sums are sums of products of sawtooth functions, and I think used to be more in fashion than they are now. Newman's argument is simply this. We want to see whether an eta-quotient is invariant under the action of the subgroup Gamma_1(N) of SL(2,Z).

234