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Theorem add-even

⊦ (j1 + j2) % 2 = 0 → ((j1 ^2 + j2 ^2) % 2 ≠ 0 ↔ false)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 3
Used lemmas: even,
Used spec theorems:
- int-div/even-add
Used simplifier rules: