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Theorem numabsneg

⊦ i < 0 → abs((* i)) = ~ i

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: sub-sub-03, sub-zero, sub-eq, Minus-def, abs-08,
Used spec theorems:
- Used simplifier rules:
  - int-basic2/add-c
  - int-basic2/add-a