p-Adic coupling of mock modular forms and shadows.
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- Record sourced from PubMed, PMID 20308587.
- Also identified by DOI 10.1073/pnas.1001355107 and PMC identifier 2852000.
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Abstract
A "mock modular form" is the holomorphic part of a harmonic Maass form f. The nonholomorphic part of f is a period integral of its "shadow," a cusp form g. A direct method for relating the coefficients of shadows and mock modular forms is not known. We solve these problems when the shadow is an integer weight newform. Our solution is p-adic, and it relies on our definition of an algebraic "regularized mock modular form." As an application, we consider the modular solution to the cubic "arithmetic-geometric mean."