Math & Science ⇒ please help me input the column vector

[dream_big]

I'm quite a newcomer to LaTeX.
Now I'm trying to input a row vector * a column vector see,in the attachment in an align environment.
But I don't know how...
please give me some help
thank you so much

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[cgnieder]

Hi dream_big,

Welcome to the LaTeX community.

Do you mean something like

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[
  \begin{bmatrix}
    x_1 & x_2 & \cdots & x_n
  \end{bmatrix}
  \times
  \begin{bmatrix}
    y_1 \\ y_2 \\ \vdots \\ y_n
  \end{bmatrix}
  \]
\end{document}

You might be interested in reading mathmode.

Regards