We consider some of the properties of divisor functions arising from q-series and theta functions. Using these we obtain several new identities involving divisor functions. On the other hand we prove a conjecture of Z. H. Sun concerning representations by the ternary quadratic form x(2) + y(2) + 3z(2), and also get an analogous result for x(2) + y(2) + 2z(2).
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Univ Illinois, Dept Math, 1409 W Green St, Urbana, IL 61801 USAUniv Illinois, Dept Math, 1409 W Green St, Urbana, IL 61801 USA
Ahlgren, Scott
Kim, Byungchan
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Seoul Natl Univ Sci & Technol, Sch Liberal Arts, 232 Gongneung Ro, Seoul 01811, South KoreaUniv Illinois, Dept Math, 1409 W Green St, Urbana, IL 61801 USA
Kim, Byungchan
Lovejoy, Jeremy
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Univ Calif Berkeley, Dept Math, 970 Evans Hall 3780, Berkeley, CA 94720 USA
Univ Denis Diderot Paris 7, CNRS, Case 7014, F-75205 Paris 13, FranceUniv Illinois, Dept Math, 1409 W Green St, Urbana, IL 61801 USA
机构:
Luoyang Teachers Coll, Dept Math, Luoyang 471022, Peoples R China
Henan Normal Univ, Coll Math & Informat Sci, Xinxiang 450001, Peoples R ChinaLuoyang Teachers Coll, Dept Math, Luoyang 471022, Peoples R China
Zhang, Zhizheng
Hu, Qiuxia
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Henan Normal Univ, Coll Math & Informat Sci, Xinxiang 450001, Peoples R ChinaLuoyang Teachers Coll, Dept Math, Luoyang 471022, Peoples R China