TY - JOUR AU - Bağdagül Kartal PY - 2023/01/11 Y2 - 2024/03/28 TI - On Necessary and Sufficient Conditions for Absolute Matrix Summability JF - Earthline Journal of Mathematical Sciences JA - EJMS VL - 12 IS - 1 SE - Articles DO - 10.34198/ejms.12123.112 UR - https://earthlinepublishers.com/index.php/ejms/article/view/663 AB - This study gets a new general theorem related to necessary and sufficient conditions for $\varphi-{\mid D,\beta;\delta\mid}_{k}$ summability of the series $\sum a_n \lambda_n$ whenever the series $\sum a_n$ is summable $\varphi-{\mid C,\beta;\delta\mid}$, where $C=(c_{nv})$ and $D=(d_{nv})$ are two positive normal matrices, $k\geq 1$, $\delta\geq 0$ and $-\beta(\delta{k}+k-1)+k > 0$. ER -