Infinite partition regular matrices
Infinite partition regular matrices
复制标题
无限划分正则矩阵
DOI:
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发表时间:
1995
期刊:
影响因子:
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通讯作者:
H. Lefmann
中科院分区:
文献类型:
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作者:
W. Deuber;N. Hindman;I. Leader;H. Lefmann
AbstractWe consider infinite matrices with entries fromℤ (and only finitely many nonzero entries on any row). A matrixA is partition regular overℕ provided that, whenever the setℕ of positive integers is partitioned into finitely many classes there is a vector
$$overrightarrow x$$
with entries inℤ such that all entries ofA
$$Aoverrightarrow x$$
lie in the same cell of the partition. We show that, in marked contrast with the situation for finite matrices, there exists a finite partition ofℕ no cell of which contains solutions for all partition regular matrices and determine which of our pairs of matrices must always have solutions in the same cell of a partition.