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Theorem square-eq-one

⊦ r * r = 1.r ↔ r = 1.r ∨ r + 1.r = 0.r

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: 1
Proof steps: 6
Used lemmas: abs-ite, mult-com, mult-ass, mult-one, square-eq,
Used spec theorems:
- Used simplifier rules: