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Sums of Quadratic Functions with Two Discriminants and Farkas' Identities with Quartic Characters.

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dc.contributor.author Wong, Ka Lun
dc.date.accessioned 2019-05-28T20:10:48Z
dc.date.available 2019-05-28T20:10:48Z
dc.date.issued 2017-08
dc.identifier.uri http://hdl.handle.net/10125/62523
dc.subject dissertations
dc.subject mathematics
dc.subject number theory
dc.subject modular forms
dc.title Sums of Quadratic Functions with Two Discriminants and Farkas' Identities with Quartic Characters.
dc.type Thesis
dc.contributor.department Mathematics
dcterms.abstract Zagier in [21] discusses a construction of a function Fk;D(x) de ned for an even integer k 2, and a positive discriminant D. This construction is intimately related to half-integral weight modular forms. In particular, the average value of this function is a constant multiple of the D-th Fourier coe cient of weight k + 1=2 Eisenstein series constructed by H. Cohen in [2]. In this dissertation, we consider a construction which works both for even and odd positive integers k. Our function Fk;D;d(x) depends on two discriminants d and D with signs sign(d) = sign(D) = (􀀀1)k, degenerates to Zagier's function when d = 1, namely, Fk;D;1(x) = Fk;D(x); and has very similar properties. In particular, we prove that the average value of Fk;D;d(x) is again a Fourier coe cient of H. Cohen's Eisenstein series of weight k + 1=2, while now the integer k 2 is allowed to be both even and odd. In [6] Farkas introduces a new arithmetic function and proves an identity involving this function. Guerzhoy and Raji [8] generalize this function for primes that are congruent to 3 modulo 4 by introducing a quadratic Dirichlet character and nd another identity of the same type. We look at the case when p 5 (mod 8) by introducing quartic Dirichlet characters and prove an analogue of their generalization.
dcterms.description Ph.D. Thesis. University of Hawaiʻi at Mānoa 2017.
dcterms.language eng
dcterms.publisher University of Hawaiʻi at Mānoa
dcterms.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dcterms.type Text
Appears in Collections: Ph.D. - Mathematics


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