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  1. J

    Set theory question!

    Homework Statement Hi everyone, i have the following problem, that for the moment i couldn't find the solution or even how to search about... This is it, we have a family of subsets F ={F_1,...,F_p} of the set {1,2,...,k}. We know that, for every i != j, F_i !=F_j and for every pair of...