12.2.2 Greatest hits from previous weeks

12.2.2.1 What is the LaTeX command for "em dash" (a^\200\224)?
12.2.2.2 Math symbol question: Vertical bar for ''evaluated at ...''
12.2.2.3 How can I split an equation over two (or more) lines
12.2.2.4 How can I get bold math symbols?
12.2.2.5 Big Parenthesis in an Equation
12.2.2.6 Why does \\ not return a new line in an equation?
12.2.2.7 "Correct" way to bold/italicize text?
12.2.2.1 What is the LaTeX command for "em dash" (a^\200\224)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=53413

I am trying to insert the symbol in the title of the question, which I copied from a PDF article, but it appears as space in the output file. What is the corresponding LaTeX command? 
[symbols] [punctuation]
 
asked by Tarek https://tex.stackexchange.com/landing/r/digest?cta=user&id=13964 Score of 411
answered by Keks Dose https://tex.stackexchange.com/landing/r/digest?cta=user&id=4736 Score of 432
12.2.2.2 Math symbol question: Vertical bar for ''evaluated at ...''

https://tex.stackexchange.com/landing/r/digest?cta=question&id=40160

How do I insert the line "|" after the equation in LaTeX (see image below)? 
I'm using LyX so if you can point me to the symbol of that line is also OK. 
I don't know if this line has a proper name so ... 
[math-mode] [symbols] [lyx]
 
asked by cidadao https://tex.stackexchange.com/landing/r/digest?cta=user&id=10511 Score of 206
12.2.2.3 How can I split an equation over two (or more) lines

https://tex.stackexchange.com/landing/r/digest?cta=question&id=3782

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)} ... 
[math-mode] [equations] [line-breaking] [breqn]
 
asked by Peter Smit https://tex.stackexchange.com/landing/r/digest?cta=user&id=459 Score of 365
answered by Will Robertson https://tex.stackexchange.com/landing/r/digest?cta=user&id=179 Score of 228
12.2.2.4 How can I get bold math symbols?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=595

To make Latin-letter variables bold I can use e.g. \mathbf{a}, but while putting Greek letters or symbols such as \nabla inside \mathbf doesn't cause any errors or warnings, it also doesn't do ... 
[fonts] [math-mode] [symbols] [bold]
 
asked by Michael Underwood https://tex.stackexchange.com/landing/r/digest?cta=user&id=32 Score of 671
answered by Mark Meckes https://tex.stackexchange.com/landing/r/digest?cta=user&id=206 Score of 579
12.2.2.5 Big Parenthesis in an Equation

https://tex.stackexchange.com/landing/r/digest?cta=question&id=38868

I have an equation contained inside \[...\], which automatically makes a \sum with sub- and superscripts turn big--so that the summation sign looks awkward inside parenthesis.  Any idea how to make ... 
[math-mode] [delimiters]
 
asked by jamaicanworm https://tex.stackexchange.com/landing/r/digest?cta=user&id=9757 Score of 272
answered by qubyte https://tex.stackexchange.com/landing/r/digest?cta=user&id=9043 Score of 399
12.2.2.6 Why does \\ not return a new line in an equation?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=194236

\begin{equation*}\label{eq:pareto mle2} 
A_0 = \frac{1}{(\alpha+t_x)^{r+s+x}}{}_2F_1\left(r+s+x,x+1;r+s+x+1;\frac{\alpha-\beta}{\alpha + t_x} \right ) "\\\" <br> 
- \frac{1}{(\alpha+T)^{r+s+x}}{}... 
[equations] [line-breaking]
 
asked by user3714137 https://tex.stackexchange.com/landing/r/digest?cta=user&id=60029 Score of 123
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 57
12.2.2.7 "Correct" way to bold/italicize text?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=41681

Is either of these considered better/more readable/more "proper"/more conventional than the other for making text bold? If so, what is the reason? 
I like my text \textbf{bold} 
versus: 
I like my text ... 
[best-practices] [bold] [italic]
 
asked by user541686 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2694 Score of 562
answered by Todd Lehman https://tex.stackexchange.com/landing/r/digest?cta=user&id=8499 Score of 506