The Cesàro core of double sequences (Q638148)
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scientific article; zbMATH DE number 5946528
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | The Cesàro core of double sequences |
scientific article; zbMATH DE number 5946528 |
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The Cesàro core of double sequences (English)
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9 September 2011
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Summary: We characterize a new type of core for double sequences, the \(P_C\)-core, and determine necessary and sufficient conditions on a four-dimensional matrix \(A\) to yield \(P_C\)-core \(\{Ax\} \subseteq {\alpha}(P\text{-core}\{x\})\) for all \(x\in \ell^{\infty}_2\).
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core
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double sequences
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