Hi,
maybe not the right place to place this issue nor maybe it isn't the latest version (2017) of the book, on which I comment.
The formula for the L1 norm defined in the book as \sqr{x_1+...+x_n} is not norm nor it fits to the graph (which presents the L1 norm, but what is H_0?). Also the verbal form is rubbish:
"This is the same equation as the L2 norm except that the scalars are not squared:"
Simply, the dimension is a root?
Hi, maybe not the right place to place this issue nor maybe it isn't the latest version (2017) of the book, on which I comment.
The formula for the L1 norm defined in the book as \sqr{x_1+...+x_n} is not norm nor it fits to the graph (which presents the L1 norm, but what is H_0?). Also the verbal form is rubbish: "This is the same equation as the L2 norm except that the scalars are not squared:" Simply, the dimension is a root?
Commonly the taxicab norm is referred to as L1 which makes the remainder of this paragraph worthless. http://mathworld.wolfram.com/L1-Norm.html
This was what I've got from a first glance. I stopped reading elsewhere in the book.
Cheers