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Theorem numeral-1

m ≠ 0 ⊦ n +1 = (* m) ↔ n = m -1

Type: A user defined theorem
Validity: The proof is valid.
Features: ls,
Comment:
Used by: even-04, psh-05, q, three, two-01, two-02, twols,
Used by units in proved state:
Proof exists?: Yes

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Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: psh-03, c, a, pred, succ,
Used spec theorems:
- Used simplifier rules: