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math.NT2018
Modular cocycles and cup product
Roelof Bruggeman, YoungJu Choie
We extend to positive real weights Haberland's formula giving a cohomological description of the Petersson scalar product of modular cusp forms of positive even weight. This relati…
math.NT2018
Formal deformations of the algebra of Jacobi forms and Rankin-Cohen brackets
Youngju Choie, François Dumas, François Martin +1
This work is devoted to the algebraic and arithmetic properties of Rankin-Cohen brackets allowing to define and study them in several natural situations of number theory. It focuse…