2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130082We give a proof of Cartlidge's result on the $l^{p}$ operator norms of weighted mean matrices for $p=2$ on interpreting the norms as eigenvalues of certain matrices.5 pagesFunctional Analysis47A30A note on $l^2$ norms of weighted mean matricestext