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Theorem onein

⊦ # x = 1 ∧ a ∈ x → x = a '

Type: A user defined theorem
Validity: The proof is valid.
Features: forward, localforward,
Comment:
Used by:
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: in-empty, in-rec, e-01, c-03, e, a, app, c,
Used spec theorems:
- Used simplifier rules:
  - list-data/lf-01
  - list-data/elim-list-c