[kazinator]

It's quite clear to hopefully everyone that a matrix of bits can represent a DAG. That's called an adjacency matrix.

What's not obvious is what we're associating with what in the NYC taxi ride data set.

A bitmap can also represent a set: the bit positions denote enumerated element symbols, and the value indicates whether that element is present.

So we rearrange the NYC taxi ride data into a data structure based on graphs and sets, and make large bitmaps?