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Theorem minus-one

⊦ r + 1.r = 0.r → r * r0 = ~ r0

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: mult-zero, mult-com, mult-ass, mult-one, distr,
Used spec theorems:
- Used simplifier rules: