The $\underbrace{a=b=c}_{\text{comment}}$ command is producing a bracket below the equality $a=b=c$ and gives the opportunity to write a comment below that equality. Is it possible to replace that bracket by something else, such as an horizontal $[$?
33299
I'm trying to put a nice square bracket over a complex text, it should look like an \overline but with ending like  \ulcorner and \urcorner. The presence of \overrightarrow and \overleftarrow makes me believe that is possible to decorate the end of the \overline bar.  I know the existence of \overbrace, but I need a square bracket; moreover, \overbrace takes too much vertical space
72474
I'd like to use underbrace in a formula:  \begin{IEEEeqnarray}{r/C/l?s} P_{a} \left( a | \gamma, \epsilon, \hat{K} \right)  &amp; = &amp; \frac{1}{1 + \frac{\gamma}{\epsilon} \times \underbrace{  \frac{\alpha_{X} \left( p_{f} | \hat{K} \right)} {\alpha_{Y} \left( a | \hat{S} \right)} }_{\Gamma \left( a | \hat{K} \right)} }  &amp; \IEEEnonumber \end{IEEEeqnarray}   Compared to the formula without underbrace, the the underbraced part is enlarged:  \begin{IEEEeqnarray}{r/C/l?s} P_{a} \left( a | \gamma, \epsilon, \hat{K} \right)  &amp; = &amp; \frac{1}{1 + \frac{\gamma}{\epsilon} \times % \underbrace{  \frac{\alpha_{X} \left( p_{f} | \hat{K} \right)} {\alpha_{Y} \left( a | \hat{S} \right)} % }_{\Gamma \left( a | \hat{K} \right)} }  &amp; \IEEEnonumber \end{IEEEeqnarray}   How can I avoid the change of the font-size when underbracing parts of a formula?
113808
I'm writing 'cause I would like to know if there's an automatic way (like something to put in the preamble) to make the subscript behave as double subscript: for example if I write   something_a    it should behave as   something_{_a}
3907
It's easy to make subscripts in math mode: $a_i$.   How do I make a subscript outside math environment, likethis?
18942
$A  \underset{\mathbb{C}}{\sim} B \overset{\text{def}}{\iff} A=C^{-1}BC, \space C\in M_{n}(\mathbb{C})$ and similarly for $\underset{\mathbb{R}}{\sim}$.     I want to prove that $ A \underset{\mathbb{C}}{\sim} B$ for $A,B \in M_{n}(\mathbb{R})$ therefore $A \underset{\mathbb{R}}{\sim} B$.   My idea is that elementary divisors of $A,B$ over $\mathbb{C}$ are the same, and if $(x-z)^k$ is elementary divisor than $(x-\overline{z})^k$ is also elementary divisor $\implies$ $A,B$ have same elementary divisors over $\mathbb{R}$. But i think it's not clear.
119314
Consider the following snippet:  $$\text{d}_{H}(A,B)  = \max\left\{ \sup_{a\in A} \inf_{b\in B} \text{d}(a,b),\sup_{b\in B} \inf_{a\in A}\text{d}(a,b)\right\}$$     In the output, the text under the inf's is significantly smaller then the one under the sup's. The same happens when I have it in an align environment.  You can see the same problem in the wiki definition of the . How can I have the typeset under the inf's and sup's in the same size?
30869
Does anyone knows how can I use square brackets instead of parenthesis when numbering my equations?  I used this command:  \begin{equation} y = 2x \end{equation}     The number appears on the right hand side like (1) I want to make it [1].  Does anyone have any ideas?
12339
What is the difference between a[bc]d and a{b,c}d? Why do people use a{b,c}d when there is already a[bc]d?
18091
I want to display the structure of a matrix as shown in the image below:    Can this be done using pmatrix and \underbrace?  My attempt at combining pmatrix and \underbrace results in a compile error.  \documentclass{standalone}  \usepackage{amsmath}  \begin{document} $ \begin{pmatrix} %1 &amp; \underbrace{1 &amp; \cdots &amp; 1}_{k} \\ % compile error! 1 &amp; 1 &amp; \cdots &amp; 1 \\ 1 &amp; 1 &amp; 1 &amp; 1 \end{pmatrix} $ \end{document}
49489
I've done some research, and found this on Wikipedia. \begin{matrix}a\uparrow b=a^{b}=&amp;\underbrace {a\times a\times \dots \times a} \\&amp;b{\mbox{ copies of }}a\end{matrix} \begin{matrix}a\uparrow \uparrow b&amp;={\ ^{b}a}=&amp;\underbrace {a^{a^{{}^{.\,^{.\,^{.\,^{a}}}}}}} &amp;=&amp;\underbrace {a\uparrow (a\uparrow (\dots \uparrow a))} \\&amp;&amp;b{\mbox{ copies of }}a&amp;&amp;b{\mbox{ copies of }}a\end{matrix} I'm still a bit confused on this topic. I've done a lot of research, but I can't seem to understand this. Could somebody explain this in an understandable way? From what I can gather, for example 2↑↑3 would be 2^2^2 = 16? Then 2↑↑↑3 would be 2^2^2^2 = 256? Am I correct, or have I mis-interpreted this?
84023
I want to make an overbrace and a side brace on my matrix in order to indicate its size. How can I achieve that.    \begin{pmatrix}   1 &amp; 1 &amp; 0 &amp; .&amp; . &amp; . &amp; 0 &amp; 1  \\   0 &amp; 0 &amp; 1 &amp; .&amp; . &amp; . &amp; 1 &amp; 0 \\  .\\  .\\  .\\   0 &amp; 1 &amp; 1 &amp; . &amp; . &amp; . &amp; 1 &amp; 1  \end{pmatrix}
87373
I would like to know if it is possible to force the equation to be closer to the operation sum? When there are a lot of subscript under the sum operator, it tends to pouch the equation to the right, and this is not very aesthetic.  \sum_{n\in N_{-i}}\sum_{\substack{j \in N_{-i} \\ j \neq n}}v_j
99731
In the question , there was an answer to how to place additional sign over the equal sign. And my question is, what if I also want to have some symbol/text under the equal sign? Or if I want to use \stackrel to label my equal sign that follows an tab alignment character (&amp;=)?
925
I have the following code  \begin{align} s'(t) &amp;= -\beta s(t) i(t)\\ i'(t) &amp;= \beta s(t) i(t) - \gamma i(t)\\ r'(t) &amp;= \gamma i(t), \end{align}   and I want to enclose this with a bracket like a case, but maintaining the numbered equations.
71831
I have seen this term a lot and I was wondering what, in basic terms, what bracketing/autobracketing is.  Also, why would one want to 'bracket'?  P.S. - there are other questions asking what DoF and WB bracketing is but none asking quite the same as this.
49535
When using the command \Rightarrow is there any way to put text above it? I have tried \overbrace but is there a way to do it without this?
40189
In one of my papers I found a notation where 2 letters one under other are placed in brackets without any additional operation symbol - attached image (N m). What does this mean, is this a shortcut of summation?