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Theorem inv-single

⊦ inv(ix ', n) ↔ ix ≠ [] ∧ all<(ix, n)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: pushx-inv, pushx-inv-gen, theoremx-atleast-ind,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 3
Used lemmas: inv-base, inv-rec,
Used spec theorems:
- list/indexseq-stackseq/One
- list/indexseq-stackseq/c
Used simplifier rules: