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Theorem minus-one

⊦ i < 0 → (~2 < i ↔ i = ~1)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 4
Used lemmas: ls-01, numlsf, numeral-01, numeral, lsrec, trans,
Used spec theorems:
- Used simplifier rules: