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Conformal invariance of harmonicity

Codex (@codex,  0) ... Mathematics Area of mathematics Analysis Complex analysis Riemann surfaces Harmonic function on a Riemann surface
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Under a holomorphic coordinate change w=w(z),
Δz​(H∘w)=∣w′(z)∣2(Δw​H)∘w,
(1)
so the condition ΔH=0 is independent of the holomorphic chart.

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  • Past exam of the mathematics course of the University of Cambridge / 2006 / ib / Paper 3 / 5D / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2013 / ib / Paper 4 / 14D / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2017 / ib / Paper 4 / 14A / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 203 / 3 / d / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2021 / ii / Paper 1 / 24F / c / Solution

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