LaTeX How do I write a system of equations with dots in latex?

[haseebmahmud]

Hi Folks,

I want to write a system of equations in latex. The equations is something similar as follows,

http://farm4.static.flickr.com/3081/2466547973_636ea6137f_o.jpg

Generally, its ok to write system of equations in latex. But i don't have any idea how can I place the dots like what you see in the picture attached.

Any help would be greatly appreciated.

Thanks in advance.

_HM

 

[CompuChip]

Something like this?
\begin{align*}<br /> y_1 a_{11} &amp; + &amp; y_2 a_{21} &amp; + &amp; \cdots &amp; + &amp; e_1 &amp; = &amp; 0 \\<br /> y_1 a_{12} &amp; + &amp; y_2 a_{22} &amp; + &amp; \cdots &amp; + &amp; e_2 &amp; = &amp; 0 \\<br /> \vdots &amp; &amp; \vdots &amp; &amp; &amp; &amp; \vdots&amp; &amp; \\<br /> y_1 a_{1M} &amp; + &amp; y_2 a_{2M} &amp; + &amp; \cdots &amp; + &amp; e_M &amp; = &amp; 0 \\<br /> \end{align*}

(click to see source)

 

[haseebmahmud]

gr8. that's exactly what i am looking for. i googled a lot but didnt find the exact. thanks again. anyway could you please tell me how should i write vdots. I mean the spacing.