I watched the lecture on support vector machines and most of the lecture I did understand but the part with 2 preliminary technicalities got me totally confused, I didn't really get them. Could someone perhaps explain them to me in simple terms? I have included the part in the lecture where I get confused (lasts about 5 mins):
I have watched that part so many times, but I'm still not getting the two points.
"There has to be a built in it scale-invariance"?
"We'll be dividing by something that takes out the factor that does not affect which plane I'm talking about"?