His academic work includes the online publication Encyclopedia of Polyhedra, the textbook Multidimensional Analysis, and the instruction book Zome Geometry.

These patents cover, in part, an improved electrical meter for homes called nonintrusive load monitors.

These meters track changes in voltage and current usage by a given household and then deduce which appliances are using how much electricity and when.

[citation needed] Hart is a co-founder of North America's only Museum of Mathematics, MoMath, in New York City.

tone of the museum and spent five years designing original exhibits and workshop activities for it.