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Theorems · Theorem · number theory

UpperHalfPlane.moebius_im

∀ (g : GL (Fin 2) ℝ) (z : ℂ),
  (UpperHalfPlane.num g z / UpperHalfPlane.denom g z).im =
    ↑(Matrix.GeneralLinearGroup.det g) * z.im / Complex.normSq (UpperHalfPlane.denom g z)
Defined in
Mathlib.Analysis.Complex.UpperHalfPlane.MoebiusAction
Cited by
3 results in Mathlib
Foundations
Depth 110 from the axioms · uses propext, Classical.choice, Quot.sound

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