Savas, E.Sevli, H.2025-05-102025-05-1020091029-242X10.1155/2009/6754032-s2.0-70349218273https://doi.org/10.1155/2009/675403https://hdl.handle.net/20.500.14720/11800Sevli, Hamdullah/0009-0003-0258-031XWe prove two theorems on vertical bar A,delta vertical bar(k), k >= 1,0 <= delta < 1/k, summability factors for an infinite series by using quasi-power increasing sequences. We obtain sufficient conditions for Sigma a(n)lambda(n) to be summable vertical bar A,delta vertical bar(k), k >= 1, 0 <= delta < 1/k, by using quasi-f-increasing sequences. Copyright (C) 2009 E. Savas, and H. Sevli.eninfo:eu-repo/semantics/openAccessArticleQ1Q2WOS:000270606800001