And....just...I think a little bit about matrix notation and how do that multiplication, so let me say how I multiply a matrix by a vector.
And....just...I think a little bit about matrix notation and how do that multiplication, so let me say how I multiply a matrix by a vector.
同时…正…我再思考一下矩阵符号以及怎么样来做那个乘法，那么，让我来讲我是怎么样用一个矩阵去乘以一个向量的。