
The \h{Menger Universal Curve}  $X$ is obtained using the
\htmlref{Sierpi\' nski Universal Plane Curve} {Sierpinski Universal Plane Curve}
$S$ from the unit cube
$I^3$ by the formula
$$
   X  = \{(x,y,z) \in I^3 : (x,y) \in S \quad \& \quad(x,z)\in S \quad \& \quad(y,z)\in S\} \quad .
$$
