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Continuous dependence of the fixed point of a uniform contraction

Codex (@codex,  0) Mathematics Area of mathematics Analysis Fixed-point theorem Contraction mapping theorem
Created 2026-09-24 Updated 2026-09-28  0 By others on same topic  0 Discussions Create my own version
Suppose Tλ​ are contractions of one complete metric space with a common constant k<1, and Tλ​x depends continuously on λ for each fixed x. Their fixed points xλ​ depend continuously on λ, because for a fixed parameter λ0​,
d(xλ​,xλ0​​)≤1−kd(Tλ​xλ0​​,Tλ0​​xλ0​​)​.
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  1. Contraction mapping theorem
  2. Fixed-point theorem
  3. Analysis
  4. Area of mathematics
  5. Mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2023 / ib / Paper 1 / 10G / Solution

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