theorem
proved
term proof
recognitionThetaModularIdentity_iff_prefactor
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formal statement (Lean)
34theorem recognitionThetaModularIdentity_iff_prefactor :
35 RecognitionThetaModularIdentity ↔ Nonempty RecognitionThetaPrefactor := by
proof body
Term-mode proof.
36 constructor
37 · intro h
38 rcases h.prefactor with ⟨ρ, hcont, hinv⟩
39 exact ⟨{ ρ := ρ, continuous := hcont, inversion := hinv }⟩
40 · intro h
41 rcases h with ⟨p⟩
42 exact ⟨⟨p.ρ, p.continuous, p.inversion⟩⟩
43
44/-- Direct constructor for the modular-identity bridge. -/