Combined Algebraic Properties of Central* Sets
نویسنده
چکیده
In this work we prove that in the semigroup (N, +) if 〈xn〉n=1 is a sequence such that FS(〈xn〉n=1) is piecewise syndetic, then for any central* set A there exists a sum subsystem 〈yn〉n=1 of 〈xn〉n=1 with the property that FS(〈yn〉n=1) ∪ FP (〈yn〉n=1) ⊆ A.
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تاریخ انتشار 2007