作者PttFund (批踢踢基金)
看板Math
标题[分析] 初微(14)
时间Fri Jul 15 01:35:23 2005
Assume that f has a finite derivative in (a,b) and is continuous
on [a,b]. If |f'(x)| ≦ r < 1 for all x in (a,b). Show that f
has an unique fixed point in [a,b].
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