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theorem proved term proof

gap_topologically_protected

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formal statement (Lean)

 278theorem gap_topologically_protected :
 279    ∀ (seq : ℕ → ℤ),
 280      (∀ k, seq k ≠ 0) →
 281      ∀ k, massGap ≤ Jcost (PhiLadder (seq k)) :=

proof body

Term-mode proof.

 282  fun seq hseq k => spectral_gap (seq k) (hseq k)
 283
 284/-- **Gap rigidity**: the gap cannot close along any sequence of lattice excitations. -/

depends on (13)

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