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Theorem union-at-left
⊦ (st0 ∪ st1)[a] = (a ∈ st0 ⊃ st0[a];st1[a])
Type: An axiom
Validity: The proof is valid.
Features: ls,
Comment:
Used by:
disjoint-union-empty
,
union-left-empty
,
union-move-left
,
union-right-empty
,
Used by units in proved state:
encoding-vtbl
,
Proof exists?: No