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Theorem perm-app-left

⊦ perm(x, x0) ∧ perm(y, y0) ∧ perm(x + y, z) → perm(x0 + y0, z)

Type: A user defined theorem
Validity: The proof is valid.
Features: ss, lss,
Comment:
Used by: perm-app-left-rev-sym, perm-app-left-sym, perm-app-right-rev,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: perm-app-right, sym-02, sym-01, neq,
Used spec theorems:
- Used simplifier rules:
  - list/a