2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76077We consider classical Tsirelson-type norms of $T[A_r,θ]$ and their modified versions on $\ell_p$ spaces. We show that for any $1<p<\infty$ there is a constant $λ_p$ such that considered Tsirelson-type norms do not $λ_p$-distort any of subspaces of $\ell_p$.10 pagesFunctional Analysis46B03text