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Theorem even-mult

⊦ even(i * j) ↔ even(i) ∨ even(j)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 3
Used lemmas: even-def-mod,
Used spec theorems:
- Used simplifier rules: