This post is a reproduced version of the post in my Japanese blog.For years, a lot of beginners in machine learning have asked me such as "Do I have to learn mathematics? What kind? To what extent?" and sometimes I've found it very hard to…

Two years ago, I published a book -- written in Japanese so I'm afraid most of the readers can't read it :'( Actually this book was written as a summary of 10 major data science methods. But as two years have gone, the content of the book …