送交者: mangolasi 于 2006-2-02, 16:28:47:
回答: 在这化繁为简上面,你们就不如老何了 由 xj 于 2006-2-02, 16:24:35:
But the book I want is something like "revisit math concepts in the geometric sense" etc.
I was asked by a student what is the meaning of a matrix determinant. No matter how I talked about its usefulness in deciding the invertibility of a matrix and it's very useful in regression (which he is not learning yet so he is not interested), he is not convinced it's useful if I can not give out some physical meaning.
I looked really stupid at that moment.