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Theorem lastoc

⊦ a ∈ x → (∃ y, z. x = y + a ' + z ∧ ¬ a ∈ z)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: lastoc-rew, lasttwo,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 10
Used lemmas: app-08, Nil, in-append, in-13, a, in-rec, c, in-empty,
Used spec theorems:
- Used simplifier rules: