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lemma proved term proof

kappaA_ne_zero

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formal statement (Lean)

 105lemma kappaA_ne_zero : kappaA ≠ 0 := by

proof body

Term-mode proof.

 106  simpa [kappaA] using Constants.phi_ne_zero
 107
 108/-! Ledger units (δ subgroup) -/
 109namespace LedgerUnits
 110
 111/-- The subgroup of ℤ generated by δ. We specialize to δ = 1 for a clean order isomorphism. -/

depends on (11)

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