Re: A question about vector

Hello,

Common notation for the scalar product.

Re: A question about vector

hi,can you speak in detail? My english is very poor,and can you give me a example? thank you very much

Re: A question about vector

You mean the point symbol means scalar product?but **1** means a vector that each element equals to 1?

Re: A question about vector

Quote:

Originally Posted by

**Moo** Hello,

Common notation for the scalar product.

You mean the point symbol means scalar product?but **1** means a vector that each element equals to 1?

Re: A question about vector

Quote:

Originally Posted by

**ChinaPanda** You mean the point symbol means scalar product?but **1** means a vector that each element equals to 1?

Yes, **1** stands for $\displaystyle \begin{pmatrix} 1\\1\\ \vdots \\ 1\end{pmatrix}$

This scalar product will actually give the sum of **x**'s components.

duibuqi, wo bu hui shuo zhongwen shuxue :D

Re: A question about vector

Quote:

Originally Posted by

**Moo** Yes, **1** stands for $\displaystyle \begin{pmatrix} 1\\1\\ \vdots \\ 1\end{pmatrix}$

This scalar product will actually give the sum of **x**'s components.

duibuqi, wo bu hui shuo zhongwen shuxue :D

wow ,you're great! scalar product in chinese is dian cheng,dian (点)means a point,cheng(乘)means product