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Theorem abs-not-neg

⊦ ¬ abs(r) * abs(r0) < 0.r

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 7
Used lemmas: zero-ls-02, mult-com, mult-ass, zero-gr-01, minus-left, abs-ite,
Used spec theorems:
- Used simplifier rules: