Hilbert cube
= Hilbert cube
A Hilbert $n$-cube in the <positive integer>[positive integers] is a set
$$
\left\{a+\sum_{i\in I}x_i:I\subseteq[n]\right\},
$$
where $a,x_1,\ldots,x_n$ are positive integers.
= Hilbert cube
A Hilbert $n$-cube in the <positive integer>[positive integers] is a set
$$
\left\{a+\sum_{i\in I}x_i:I\subseteq[n]\right\},
$$
where $a,x_1,\ldots,x_n$ are positive integers.