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Theorem append-cancel-r-01

⊦ finp(σ) → (⌜x⌝ + σ = ⌜y⌝ + σ ↔ ⌜x⌝ = ⌜y⌝ )

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

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Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: append-assoc, eq-stream-to-list-2-2,
Used spec theorems:
- Used simplifier rules: