This prepares the loop to process the next block with an initial vectorequal to the result of the first block.
于是循环可以用与第一块的结果相等的初始矢量处理下一块。
2
Well, , see, that is a vector field that is equal to the vector from the origin to the point where I am, so it is pointing radially away from the origin.
也就是,这个向量场等价于,从原点指向给定位置的向量,所以它是以原点为心向外辐射的。
3
I'm going to prove that the flux of a vector field that has only a z component is actually equal to the triple integral of, RzdV well, the divergence of this is just R sub z dV.