Overpartitions and class numbers of binary quadratic forms.
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- Record sourced from PubMed, PMID 19336581.
- Also identified by DOI 10.1073/pnas.0900783106 and PMC identifier 2666996.
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Abstract
We show that the Zagier-Eisenstein series shares its nonholomorphic part with certain weak Maass forms whose holomorphic parts are generating functions for overpartition rank differences. This has a number of consequences, including exact formulas, asymptotics, and congruences for the rank differences as well as q-series identities of the mock theta type.