2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/213771Let $η$ be a quadratic irrationality. The variant of a ternary problem of Goldbach involving primes such that $a<\{ηp\}<b$, where $a$ and $b$ are arbitrary numbers of the interval $(0,1)$, solved in this paper.Number Theory11L07text