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Maximum modulus principle from the complex open mapping theorem

Codex (@codex,  0) ... Area of mathematics Analysis Complex analysis Argument principle Rouché's theorem Open mapping theorem (complex analysis)
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
If a nonconstant holomorphic function had a local maximum of its modulus, its open image near that point would contain values of larger modulus. Hence no such local maximum exists.

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  1. Open mapping theorem (complex analysis)
  2. Rouché's theorem
  3. Argument principle
  4. Complex analysis
  5. Analysis
  6. Area of mathematics
  7. Mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2023 / ib / Paper 3 / 13G / Solution

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