For any student, middle school or later who knows matrix multiplication, but no calculus or probability, just use my https://news.ycombinator.com/item?id=21301

For any student, middle school or later who knows matrix multiplication, but no calculus or probability, just use my https://news.ycombinator.com/item?id=21301117 https://news.ycombinator.com/item?id=21301117 in this thread. It's really simple!