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Initializing...
`BookProof.FockNumberPreservingGap.fock_gap_of_one_particle_form_gap` (b : HilbertBasis ℕ ℂ F) (A : finiteModeDomain b →ₗ[ℂ] finiteModeDomain b) {mu : ℝ} (hmu : 0 ≤ mu) (hgap : ∀ x · Prove2Me