Hmmm.. I heard in a conference that most well understood engineering principles or theories have a neat geometric interpretation. Personally I find a theory wit

Hmmm.. I heard in a conference that most well understood engineering principles or theories have a neat geometric interpretation. Personally I find a theory with geometric interpretation far easier to grasp. On the other hand, the higher dimensions geometry confuses me a lot: most random sparse vectors are orthogonal to each other, and most volumes of a sphere in that dimension are concentrated in a place.