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Theorem pnls-negpos

i ≤ i0, j0 ≤ j, 0 ≤ j0, i0 ≤ 0 ⊦ ¬ i0 * j0 < i * j

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: ls-pos, ls-neg, commutativity, associativity, ls-forward,
Used spec theorems:
- Used simplifier rules: