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Theorem not-odd-ex

⊦ ¬ odd(i) ↔ (∃ j. i = j + j)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: not-even-odd, odd-def-mod,
Used by units in proved state: int-gcd,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: odd-def,
Used spec theorems:
- int-mult/ex-two
Used simplifier rules: