Necessary conditions for absolute matrix summability methods
The authors obtain necessary conditions in order that a series \(\sum a_{n}\) should be summable \(|B,q_{n}|_{k}\) whenever \(\sum a_{n}\) is summable \( |A,p_{n}|_{k}\) as a generalization of the result of \textit{H. Bor} and \textit{B. Thorpe} [Analysis 12, No. 1--2, 1--3 (1992; Zbl 0753.40007)].
scientific article; zbMATH DE number 6529433