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Theorems · Theorem · complex analysis

MeromorphicOn.codiscrete_setOfPred_meromorphicOrderAt_eq_zero_or_top

∀ {𝕜 : Type u_1} [inst : NontriviallyNormedField 𝕜] {E : Type u_2} [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] {f : 𝕜 → E} {U : Set 𝕜},
  MeromorphicOn f U → {u | meromorphicOrderAt f ↑u = 0 ∨ meromorphicOrderAt f ↑u = ⊤} ∈ Filter.codiscrete ↑U

The set where a meromorphic function has zero or infinite order is codiscrete within its domain of meromorphicity.

Defined in
Mathlib.Analysis.Meromorphic.Order
Cited by
2 results in Mathlib
Foundations
Depth 204 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NontriviallyNormedFieldNormedAddCommGroupNormedSpace

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