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Theorem exists-def

⊦ bag.exists(p) ↔ (∃ a. a ∈ bag ∧ p(a))

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: 4
Proof steps: 13
Used lemmas: exists-rec, exists-base, in,
Used spec theorems:
- Used simplifier rules: