Centuries - 9th century - 10th century - 11th century
Decades: 940s 950s 960s 970s 980s - 990s - 1000s 1010s 1020s 1030s 1040s
Years: 988 989 990 991 992 - 993 - 994 995 996 997 998
... that does not belong to F, there is a continuous function f from X to the real line R such that f(x) = 0 and f(y) = 1 for every y in F.
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