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Periodic Points and Contractive Mappings
Published online by Cambridge University Press: 20 November 2018
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Let X be a non-empty set and f:X→X. A point x ∈ X is (i) a fixed point off f(x)=x, and (ii) a periodic point of f iff there is a positive integer N such that fN(x)=x. Also a periodic orbit of f is the (finite) set {x, f(x), f2(x),…} where x is a periodic point of f.
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- Copyright © Canadian Mathematical Society 1974