2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54634For any rational number $p_0\ge 2$ we prove an identity of Rogers-Ramanujan's type. Bijection between the space od states for $XXZ$ model and that of $XXX$ model is constructed12 pages, LATEXHigh Energy Physics - Theorytext