Mathematical Inequalities & Applications · Volume 20, Issue 1 Pointwise convergence and Cesàro summability of double orthogonal series 20-12 Pages 181-189 DOI 10.7153/mia-20-12 Downloads Short PDF Full PDF PNG Authors Ferenc Móricz Zoltán Németh Keywords double orthogonal series pointwise convergence Cesàro summability Subject classes 42B08 42C10