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Theorem lf-01

⊦ # x = 1 ↔ x = x.first + []

Type: A user defined theorem
Validity: The proof is valid.
Features: localsimp,
Comment:
Used by: eq-one, le-one-01, lf,
Used by units in proved state: list,
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: f, l, size-02, disj-1, size-01, elim-list-c,
Used spec theorems:
- Used simplifier rules: