test
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import Mathlib.Analysis.Complex.CauchyIntegral
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--import Mathlib.Analysis.Complex.Module
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-- test
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open ComplexConjugate
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@ -83,17 +83,17 @@ theorem JensenFormula₂ :
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rw [← tmp]
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rw [this]
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have : ∀ z : ℂ, log (Complex.abs z) = 1/2 * Complex.log z + 1/2 * Complex.log (conj z) := by
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intro z
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by_cases argHyp : Complex.arg z = π
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by_cases argHyp : Complex.arg z = π
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· rw [Complex.log, argHyp, Complex.log]
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let ZZ := Complex.arg_conj z
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rw [argHyp] at ZZ
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simp at ZZ
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have : conj z = z := by
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@ -103,7 +103,7 @@ theorem JensenFormula₂ :
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let ZZ := Complex.log_conj z
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nth_rewrite 1 [Complex.log]
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simp
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let φ := Complex.arg z
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