On absolute de la Vallée Poussin summability

B. Kwee
1972 Pacific Journal of Mathematics  
Gronwall proved that (C,r)Q(V-P) for r ^ 0, where (C,r) and (V -P) denote Ces&ro and de la Vallee Poussin summability. It is proved in this paper that | C, r | £ | V -P \ for r ^ 0.
doi:10.2140/pjm.1972.42.689 fatcat:hktvjqeo75cj7a4o2oqvdipewi