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Theorem exnotempty

⊦ st = ∅ ↔ ¬(∃ a, d, st0. st = st0[a, d] ∧ ¬ a ∈ 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: 5
Proof steps: 9
Used lemmas: Del-notin, ins-same-01, del-put, notmemlookup, In-empty, Extension, neq,
Used spec theorems:
- Used simplifier rules: