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Theorem ascsubseq-append

⊦ ascsubseq(ix + n0 ', x) → (¬ ascsubseq((ix + n0 ') + n ', x) ↔ ¬ precedes(n0, n, x))

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 12
Used lemmas: ascsubseq-single, ascsubseq-rec, ascsubseq-2,
Used spec theorems:
- Used simplifier rules:
  - nat/lels
  - list/indexseq/a
  - list/indexseq/c
  - list/indexseq/Nil