Given a semigroup SS and an nn-partition PP of SS, $n\in NN,dothereexist,dothereexistA\in PPandasubsetandasubsetFofofS$ such that S=F−1{x∈S:xA⋂A≠∅}S=F−1{x∈S:xA⋂A=∅} and ∣F∣≤n∣F∣≤n? We give an affirmative answer provided that either SS is finite or n=2n=2.
生成讲解博客的中文版本
生成AI智能校验的中文版本