2.33.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

2.33.2.1 Difference between \textwidth, \linewidth and \hsize

http://tex.stackexchange.com/questions/16942/difference-between-textwidth-linewidth-and-hsize

The three lengths \textwidth, \linewidth and \hsize seem to all hold the width of the current line. At least I never saw some real difference between \textwidth and \linewidth in my code. Both seem to  ...
 

- asked by Martin Scharrer (265 votes), answered by egreg (173 votes)

2.33.2.2 How can I split an equation over two lines

http://tex.stackexchange.com/questions/3782/how-can-i-split-an-equation-over-two-lines

I am having the following equation: 
\begin{equation} 
Q(\lambda,\hat{\lambda}) = -\frac{1}{2} P(O \mid \lambda ) \sum_s \sum_m \sum_t \gamma_m^{(s)} (t) \left( n \log(2 \pi ) + \log \left| C_m^{(s)}  ...
 

- asked by Peter Smit (122 votes), answered by Will Robertson (95 votes)