actualize
   stream

with
   data

   
by morphism
   :stream → datastream; 
   :list → datalist; 
   :elem → data; 
   [] → []; 
   [] → []; 
   + → +; 
   # → #; 
   ' → '; 
   + → +; 
   + → +; 
   +2 → +2; 
   ++ → ++; 
   rmdup → rmdup; 
   rev → rev; 
   mklist → mklist; 
   fillfirst → fillfirst; 
   -l → -l; 
   -1l → -1l; 
   -p → -p; 
   pos → pos; 
   frome → frome; 
   ⌜ ⌝ → ⌜ ⌝; 
   ⌜ ⌝ → ⌜ ⌝; 
   + → +; 
   + → +; 
   # → #; 
   to → to; 
   from → from; 
   < → <; 
   ∈ → ∈; 
   dups → dups; 
   disj → disj; 
   ⊑ → ⊑; 
   ⊒ → ⊒; 
   finp → finp; 
   ≤ → ≤; 
   a → d; 
   b → d0; 
   c → d1; 
   a0 → d2; 
   x → dx; 
   x0 → dx0; 
   x1 → dx1; 
   y → dx3; 
   z → dx7; 
   σ1 → σ1; 
   σ2 → σ2; 
   σ → σ; 
   nf → nf; 
   nf0 → nf0; 
   .head → .head; 
   .tail → .tail; 
   .last → .last; 
   .butlast → .butlast; 
   butlastn → butlastn; 
   [ ] → [ ]; 
   [ ] → [ ]; 
   firstn → firstn; 
   restn → restn; 
   lastn → lastn; 
   sublist → sublist; 
   .l → .l; 
   .f → .f; 
   hd → hd; 
   tl → tl; 
   [ ] → [ ]; 
   [ ] → [ ]; 
   to → to; 
   to∞ → to∞; 
   from → from; 
   to → to; 
   from → from
end actualize