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Theorems · Theorem · number theory

ModularGroup.im_smul_eq_div_normSq

∀ (g : Matrix.SpecialLinearGroup (Fin 2) ℤ) (z : UpperHalfPlane),
  (g • z).im =
    z.im /
      Complex.normSq
        (UpperHalfPlane.denom (Matrix.SpecialLinearGroup.toGL ((Matrix.SpecialLinearGroup.map (Int.castRingHom ℝ)) g))
          ↑z)
Defined in
Mathlib.Analysis.Complex.UpperHalfPlane.MoebiusAction
Cited by
6 results in Mathlib
Foundations
Depth 174 from the axioms · uses propext, Classical.choice, Quot.sound

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