... Littlewood and Paley,” Proceedings of the London Mathematical Society Third Series, vol 7, pp 113–141, 1957 [4] B E Rhoades and E Savas, A note on absolute summability factors, ” Periodica Mathematica ... N Mishra and R S L Srivastava, On | N, pn | summability factors of infinite series,” Indian Journal of Pure and Applied Mathematics, vol 15, no 6, pp 651–656, 1984 –– [2] H Bor, A note on | N, ... si si + ann n sn − an,i+1 aii i ann n (i + 1)ai+1,i+1 i =0 ani λi λi+1 λ − an,i+1 si + ann n aii i (i + 1)ai+1,i+1 nann We may write an,i+1 λi+1 an,i+1 λi+1 an,i+1 λi an,i+1 λi ani λi ani λi...