Locally harmonic Maass forms and periods of meromorphic modular forms
Locally harmonic Maass forms and periods of meromorphic modular forms
We investigate a new family of locally harmonic Maass forms which correspond to periods of modular forms. They transform like negative weight modular forms and are harmonic apart from jump singularities along infinite geodesics. Our main result is an explicit splitting of the new locally harmonic Maass forms into a harmonic part and a locally polynomial part that captures the jump singularities. As an application, we obtain finite rational formulas for suitable linear combinations of periods of meromorphic modular forms associated to positive definite binary quadratic forms.
21 pages, 1 figure
- ETH Zurich Switzerland
- University of Amsterdam Netherlands
11F11, 11F37, 11F67, Mathematics - Number Theory, periods, FOS: Mathematics, meromorphic modular forms, Special values of automorphic \(L\)-series, periods of automorphic forms, cohomology, modular symbols, Number Theory (math.NT), Holomorphic modular forms of integral weight, Forms of half-integer weight; nonholomorphic modular forms, positive definite binary quadratic forms
11F11, 11F37, 11F67, Mathematics - Number Theory, periods, FOS: Mathematics, meromorphic modular forms, Special values of automorphic \(L\)-series, periods of automorphic forms, cohomology, modular symbols, Number Theory (math.NT), Holomorphic modular forms of integral weight, Forms of half-integer weight; nonholomorphic modular forms, positive definite binary quadratic forms
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