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Mathlib.Analysis.Meromorphic.RCLike

Meromorphic Functions over the Real and Complex Numbers #

This file gathers results on meromorphic functions specifict to the real and complex numbers.

theorem Meromorphic.exists_meromorphicOrderAt_ne_top_iff_forall {𝕜 : Type u_1} [RCLike 𝕜] {E : Type u_2} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {f : 𝕜E} (hf : Meromorphic f) :
(∃ (u : 𝕜), meromorphicOrderAt f u ) ∀ (u : 𝕜), meromorphicOrderAt f u

If f is meromorphic function on or , then there exists a point where a meromorphic function f has finite order iff f has finite order at every point.