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Theorem even-def
⊦ even(i) ↔ (∃ j. i = j + j)
Type: An axiom
Validity: The proof is valid.
Features:
Comment:
Used by:
even-def-mod
,
even-not
,
even-rec
,
even-zero
,
not-even-odd
,
Used by units in proved state:
int-gcd
,
Proof exists?: No