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Theorem c

⊦ perm(x, y + z) → perm(x0 + x, y + x0 + z)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by: app-beg-in, app-in-beg,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 7
Used lemmas: oc-zero, ocappend, msubset, perm,
Used spec theorems:
- Used simplifier rules:
  - nat-basic/c
  - nat-basic/a
  - nat/lep-02
  - list/a
  - nat-basic/f
  - nat/le-def
  - nat/le-ls-simp