Representations of squares by certain diagonal quadratic forms in odd number of variables

B. Ramakrishnan, Brundaban Sahu, Anup Kumar Singh

In this paper, we consider the following diagonal quadratic forms \begin{equation*} a_1x_1^2 + a_2x_2^2 + \cdots + a_{\ell}x_{\ell}^2, \end{equation*} where $\ell \ge 5$ is an odd i…