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  • 1 University of Sarajevo Department of Mathematics Sarajevo BiH 71000 Yugoslavia
  • 2 University of North Florida Department of Mathematics and Statistics building 11 Jacksonville Jacksonville Florida 32224 USA
  • 3 Bosphorous University Department of Mathematics Istanbul Turkey 34342
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Abstract  

The concepts of subsequence and rearrangement of double sequence are used to present multidimensional analogues of the following core questions. If x is a bounded real sequence and A is a matrix summability method, under what conditions does there exist y, a subsequence (rearrangement) of x such that each number t in the core of x is a limit point of Ay?

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