Savaş, E.2025-05-102025-05-1020051331-434310.7153/mia-08-472-s2.0-22944488603https://doi.org/10.7153/mia-08-47https://hdl.handle.net/20.500.14720/6424We obtain sufficient conditions for the series ∑an, which is absolutely summable of order k by a triangular matrix method A, 1 < k ≤ s < ∞, to be such that ∑an is absolutely summable of order s by a triangular matrix B. As corollaries, we obtain a number of inclusion theorems. © ELEMENT, Zagreb.eninfo:eu-repo/semantics/openAccessAbsolute SummabilityCesáro MatrixSummability FactorWeighted Mean MatrixArticle83Q2Q2521527WOS:000230764400013