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Theorem posint-factor

⊦ i < 0 → (* i).r * r = ~((~ i).r * r)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment: prefer positive integers as factors
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 3
Used lemmas: mult-com, mult-ass, mult-zero, num-distr,
Used spec theorems:
- Used simplifier rules: