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Published online by Cambridge University Press: 24 October 2008
The following properties of the real numbers are well known:
If (xn) is a sequence of real numbers, xn → x and xn ≥ 0 for each n then x > 0. (1)
If (xn) is a sequence of real numbers, xn → x and x > 0 then, for all sufficiently large n,xn > 0.