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Tue 26 Oct, 2010 09:21 pm
What is the set of accumulation points of the irrational numbers?
Give an example of abounded set of real number with exactly three accumulation points?
Let A subset of R A ⊊ R and let x in R show that x is an accumulation point of A if and only if there exists of a sequence of distinct points in A that converge to x?