Sevli, H.Leindler, L.2025-05-102025-05-1020090898-122110.1016/j.camwa.2008.11.0072-s2.0-58749085522https://doi.org/10.1016/j.camwa.2008.11.007https://hdl.handle.net/20.500.14720/9902Sevli, Hamdullah/0009-0003-0258-031XIn this paper, we prove two theorems on vertical bar A vertical bar(k), k >= 1, summability factors for an infinite series by replacing a Riesz matrix with a lower triangular matrix and using quasi-power-increasing sequences instead of almost increasing sequences. We obtain sufficient conditions for Sigma a(n)lambda(n) to be summable vertical bar A vertical bar(k), k >= 1, by using quasi-f-increasing sequences. (C) 2008 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/openAccessSummability FactorsAbsolute SummabilityQuasi-Monotone SequencesAlmost Increasing SequencesInfinite SeriesLower Triangular MatrixArticle575Q1Q1702709WOS:000263708000003