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Theorem two-even

⊦ i % 2 = 0 → (i / 2 = j ↔ i = 2 * j)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: div-twoodd-01, div2-odd, ls-even-01, two-odd,
Used by units in proved state: int-square,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: one, div-mult-num-01, divmult,
Used spec theorems:
- Used simplifier rules:
  - int-mult/commutativity
  - int-mult/associativity