Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T10:38:37.217Z Has data issue: false hasContentIssue false

CONGRUENCES MODULO 4 FOR WEIGHT $\textbf{3/2}$ ETA-PRODUCTS

Published online by Cambridge University Press:  05 October 2020

RONG CHEN*
Affiliation:
School of Mathematical Sciences, East China Normal University, Shanghai, People’s Republic of China
F. G. GARVAN
Affiliation:
Department of Mathematics, University of Florida, Gainesville, FL32611-8105, USA e-mail: [email protected]

Abstract

We find and prove a class of congruences modulo 4 for eta-products associated with certain ternary quadratic forms. This study was inspired by similar conjectured congruences modulo 4 for certain mock theta functions.

Type
Research Article
Copyright
© 2020 Australian Mathematical Publishing Association Inc.

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

The second author was supported in part by a grant from the Simons Foundation (#318714).

References

Berndt, B. C., Ramanujan’s Notebooks, Part III (Springer-Verlag, New York, 1991).CrossRefGoogle Scholar
Borevich, Z. I. and Shafarevich, I. R., Number Theory (Academic Press, New York, 1966).Google Scholar
Bryson, J., Ono, K., Pitman, S. and Rhoades, R. C., ‘Unimodal sequences and quantum and mock modular forms’, Proc. Natl. Acad. Sci. USA 109(40) (2012), 1606316067.CrossRefGoogle Scholar
Cooper, S. and Lam, H. Y., ‘On the Diophantine equation ${n}^2={x}^2+b{y}^2+c{z}^2$ ’, J. Number Theory 133 (2013), 719737.CrossRefGoogle Scholar
Gauss, C. F., Disquisitiones Arithmeticae (Fleischer, Leipzig, 1801).CrossRefGoogle Scholar
Grosswald, E., Representations of Integers as Sums of Squares (Springer-Verlag, Berlin, 1984).Google Scholar
Guo, X. J., Peng, Y. Z. and Qin, H. R., ‘On the representation numbers of ternary quadratic forms and modular forms of weight $3/ 2$ ’, J. Number Theory 140 (2014), 235266.10.1016/j.jnt.2014.01.024CrossRefGoogle Scholar
Hirschhorn, M. D. and Sellers, J., ‘On representations of a number as a sum of three squares’, Discrete Math. 199 (1999), 85101.CrossRefGoogle Scholar
Kim, B., Lim, S. and Lovejoy, J., ‘Odd-balanced unimodal sequences and related functions: Parity, mock modularity and quantum modularity’, Proc. Amer. Math. Soc. 144 (2016), 36873700.CrossRefGoogle Scholar
Shemanske, T. R., ‘Representations of ternary quadratic forms and the class number of imaginary quadratic fields’, Pacific J. Math. 122(1) (1986), 223250.CrossRefGoogle Scholar