> I always think of dimensional reduction when I see these headlines, which is sadly very unrelated. Actually, the two are related. The Buckingham pi theorem o

> I always think of dimensional reduction when I see these headlines, which is sadly very unrelated. Actually, the two are related. The Buckingham pi theorem of dimensional analysis guarantees the reduction of the number of variables ("dimension" in a different sense) in many instances. https://en.wikipedia.org/wiki/Buckingham_%CF%80_theorem https://en.wikipedia.org/wiki/Buckingham_%CF%80_theorem This fact is frequently used in experiments in some areas of physics to reduce the number of tests.