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Theorem size-subset

⊦ st ⊆ st0 → # st ≤ # st0

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: subset-size,
Used spec theorems:
- Used simplifier rules:
  - nat/lels-01