2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156797Let $T_1: L_2(Ω^2) \to L_2(Ω^2)$ be a partial integral operator with the kernel from $C(Ω^3)$ where $Ω=[a,b ]^ν.$ In this paper we investigate solvability of a partial integral equation $f-\varkappa T_1 f=g_0$ in the space $L_2(Ω^2)$ in the case when $\varkappa$ is a characteristic number. We proved the theorem describing the necessary and sufficient condition for solvability of the partial integral equation $f-\varkappa T_1 f=g_0.$9 pagesFunctional Analysistext