actualize
set-union
with
string
by morphism
:set → stringset;
:elem → string;
∅ → ∅;
++ → ++;
# → #;
{ } → { };
∪ → ∪;
∩ → ∩;
\ → \;
-- → --;
∈ → ∈;
⊆ → ⊆;
s → strings;
s0 → strings0;
s1 → strings1;
s2 → strings2;
a → str;
b → str0;
c → str1
end actualize