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Theorem key-size

∀ a. a ∈ st ↔ a ∈ 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: 12
Proof steps: 24
Used lemmas: Del-in, size, Size-insert, size-in, In-insert, In-empty, empty, Size-empty, gen-04,
Used spec theorems:
- Used simplifier rules: