... Cañestro and Ortega Salvador Journal of Inequalities and Applications 2011, 2011:13http://www.journalofinequalitiesandapplications.com/content/2011/1/13Page 12 of 12 and, on the other hand,||Tf ... |,Aguilar Cañestro and Ortega Salvador Journal of Inequalities and Applications 2011, 2011:13http://www.journalofinequalitiesandapplications.com/content/2011/1/13Page 3 of 12where||g||p,∞;u,q=n∈Z||gX(n,n+1)||qp,∞,u1q.There ... ≤ Tf (x)+Tg (x) and Tf(x) ≤ Tg(x)if0≤ f (x) ≤ g(x).Aguilar Cañestro and Ortega Salvador Journal of Inequalities and Applications 2011, 2011:13http://www.journalofinequalitiesandapplications.com/content/2011/1/13Page...