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Theorem in-put

⊦ a ∈ ax[b, d] ↔ a = b ∨ a ∈ ax

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 4
Proof steps: 7
Used lemmas: inrec, put-yes, put-no, inapp, empty, inone, put-empty,
Used spec theorems:
- Used simplifier rules:
  - list/assoclista/c
  - list/assoclista/a