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Theorem subset-smaller

⊦ bag0 ++ a ⊆ bag1 → (bag0 ⊆ bag1 ↔ true)

Type: A user defined theorem
Validity: The proof is valid.
Features: ss, lss,
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: 8
Used lemmas: count-subset,
Used spec theorems:
- bag-basic/count-other
Used simplifier rules: