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Theorem sum-notinf

⊦ n∞ = ⌜m⌝ + ⌜n⌝ → (n∞ = ∞ ↔ false)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
Used by units in proved state: stut-mon,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: add-comm, add-assoc, addeqinf-cancel,
Used spec theorems:
- Used simplifier rules:
  - nat-inf-basic/disj