The Number of Representations of a Positive Integer as a Sum of Four Triangular Numbers
Aeran Kim *
A Private Mathematics Academy, 1-#406, 23, Maebong 5-gil, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54921, Republic of Korea.
*Author to whom correspondence should be addressed.
Abstract
In this paper we evaluate the number of representations of n(∈ N) as a sum of four triangular
numbers by simple method based on Jacobi's theta functions dened by
Keywords: Divisor functions, triangular numbers, theta function