theorem
proved
term proof
zero_ne_succ
show as:
view Lean formalization →
formal statement (Lean)
89theorem zero_ne_succ (n : LogicNat) : zero ≠ succ n := by
proof body
Term-mode proof.
90 intro h; cases h
91
92/-- **Peano P1, contrapositive**: every successor differs from zero. -/
used by (19)
-
canonicalCategoricalRealization -
logicNatNNO -
boolRealization -
ofPositiveRatioComparison -
positiveRatio_faithful -
modularRealization -
natOrderedRealization -
physics_faithful -
physicsRealization -
biologyRealization -
ethicsRealization -
modularRealization -
musicRealization -
narrativeRealization -
interpret_collapses -
orderRealization -
strictCategoricalRealization -
toLightweight -
logicRealizationOfDistinction