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Theorem pnls-pos

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

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 4
Used lemmas: zero-ls-02, commutativity, associativity, zero-left, ple-pos,
Used spec theorems:
- int-abs/lels
Used simplifier rules: