TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have scoured my code and tried it out without the alignment. There is nothing i can see wrong with the code, but when I try to use align or eqnarray, I always get some error message. Here's the code

\oint_{|\zeta| &= \hat{R_2}} \frac{f(\zeta)}{\zeta - z} d\zeta \\ 
           &= \oint \frac{f(\zeta)}{\zeta} \frac{1}{1 - \frac{z}{\zeta}}    
&= \oint \frac{f(\zeta)}{\zeta} \frac{1}{1 - \frac{z}  
{\zeta}} d\zeta \\      
&= \oint \frac{f(\zeta)}{\zeta} \cdot \left( 1 +   
\frac{z}{\zeta} + \frac{z^2}{\zeta^2} + \cdots \right)  d\zeta \\
&= \oint \frac{f(\zeta)}{\zeta} d\zeta + \oint \frac{f(\zeta)} 
{\zeta^2} z d\zeta + \oint \frac{f(\zeta)}{\zeta^3} z^2 d\zeta

And here's the error message:

home/username/Dropbox/Math 132/.2013-07-01.tex.swp:105: Missing } inserted.   

<inserted text> 
l.105 \end{align*}

/home/username/Dropbox/Math 132/.2013-07-01.tex.swp:105: ==> Fatal error occurred,

Thank you !

share|improve this question
You have a & in the subscript of \oint. That doesn’t belong there. – Qrrbrbirlbel Jul 1 '13 at 19:53

your first line should be:

\oint_{|\zeta|} &= \hat{R_2} \frac{f(\zeta)}{\zeta - z} d\zeta \\ 

and maybe that \oint\limits_ looks nicer

share|improve this answer
So the missing } was at the beginning, good catch and thank you so much! – user64742 Jul 1 '13 at 21:09



      \oint_{|\zeta|} &= \hat{R_2} \frac{f(\zeta)}{\zeta - z} d\zeta \\ 
                        &= \oint \frac{f(\zeta)}{\zeta} \frac{1}{1 - \frac{z}{\zeta}}  d\zeta\\             
                        &= \oint \frac{f(\zeta)}{\zeta} \frac{1}{1 - \frac{z} {\zeta}} d\zeta \\      
                        &= \oint \frac{f(\zeta)}{\zeta} \cdot \left( 1 + \frac{z}{\zeta} + \frac{z^2}{\zeta^2} + \cdots \right)  d\zeta \\
                        &= \oint \frac{f(\zeta)}{\zeta} d\zeta + \oint \frac{f(\zeta)} {\zeta^2} z d\zeta + \oint \frac{f(\zeta)}{\zeta^3} z^2 d\zeta


enter image description here

share|improve this answer
Please don't post only code without any explaining text. – Martin Scharrer Jul 1 '13 at 20:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.