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Theorem subset-trans

⊦ bag0 ⊆ bag1 ∧ bag1 ⊆ bag2 → bag0 ⊆ bag2

Type: A user defined theorem
Validity: The proof is valid.
Features: forward, localforward,
Comment:
Used by: subset-antisym,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 4
Used lemmas: count-subset,
Used spec theorems:
- Used simplifier rules: