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Theorem abs-05

⊦ i < 0 → abs(i + 1) = abs(i) - 1

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp, localcut,
Comment:
Used by: abs-le-succ, absls-05,
Used by units in proved state: int-mult, int-div, intnat, int-square,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: le-def, numle-03, abseq, sub-eq, sub-sub, Abs-neg,
Used spec theorems:
- Used simplifier rules: