Author

Koustav Banerjee

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Preprint Jul 2026

Proof of a conjecture of Andrews and El Bachraoui on the parity of two-color partitions

In this paper, we prove a conjecture of Andrews and El Bachraoui concerning the parity of certain two-color partitions. Precisely, we show that if the Fourier coefficient $t_o(n)$ of the corresponding $q$-series is odd, then $8n+9$ is represented by the binary quadratic form $x^2+2y^2$.

Koustav Banerjee, Kathrin Bringmann · 2 citations · ⚡1