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Theorem subseteq-def
⊦ S ⊆ S0 ↔ (∀ x. S(x) → S0(x))
Type: An axiom
Validity: The proof is valid.
Features:
Comment:
Used by:
compl-monotone
,
eq-bothsubset
,
least-fixpoint
,
nu-is-UN
,
prefixpoint-aux
,
prefixpoint-aux-nu
,
prefixpoint-aux2
,
subset-refl
,
subset-trans
,
Used by units in proved state:
fixpoint-induction
,
approx-fixpoint
,
Proof exists?: No