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Theorem abs-pred-01

⊦ i < 0 ∧ i ≠ ~1 → i→n(i + 1) = i→n(i) -1

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 2
Proof steps: 5
Used lemmas: rax-02, abs-neg, Int2nat-neg, abs-zero,
Used spec theorems:
- Used simplifier rules: