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Theorem square-zero-02

⊦ 0 ≤ j ∧ 0 ≤ i → ¬ (i + j) * (i + j + 1) < 0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 2
Used lemmas: commutativity, associativity, zero-ls-03, square-zero-01,
Used spec theorems:
- Used simplifier rules: