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A CERTAIN 2-COLORING OF THE REALS

机译:真实的某些2色

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摘要

There is a function F : [c]~(<ω)→ {0,1} such that if A is contained in [c]~(<ω) is uncountable, then {F(a ∪ b) : a, b ∈ A, a ≠ 6} = {0,1}. A corollary is that there is a function f : R → {0,1} such that if A is contained in R is uncountable, 2 ≤ k ≤ ω, then both 0 and 1 occur as the value of f at the sum of k distinct elements of A. This was originally proved by Hindman, Leader, and Strauss under CH, and they asked if it holds in general.
机译:有一个函数F:[c]〜(<ω)→{0,1}使得如果[c]〜(<ω)中包含A是不可数的,则{F(a∪b):a,b ∈A,a≠6} = {0,1}。推论是有一个函数f:R→{0,1}使得如果R中包含A是不可数的,则2≤k≤ω,则0和1都作为f的值出现在k的总和上A的不同元素。最初由CH的Hindman,Leader和Strauss证明,他们询问它是否普遍存在。

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