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Theorem del1-01

⊦ ordered≤(x) → ordered≤(x -1l a)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: del1-01-01, eqdef,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 6
Proof steps: 16
Used lemmas: le-r, le-o, ole-rec, cons-02, app-01, le-e,
Used spec theorems:
- list-del/del1-n
Used simplifier rules:
- list-del/del1-e
- list/c-08
- list-data/elim-list-c
- list/c-07
- list/app
- list/e-01
- list/c
- list/c-06
- list/a
- list-del/del1-y
- oelem/sls
- list/in-14
- oelem/transitivity
- list/in-rec