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This more-or-less summarizes some of the stuff which has already been said in the comments. If I understood correctly, the OP is asking about getting indices above/below the sign for integral or sum. I hope this answers the question at least partially. Probably the best thing to do is to show some examples: In the inline mode we can write $\sum_{n=0}^\...


The following: $$\left.\begin{array}{c} 5\\ 6 \end{array} \right] \quad 2\quad \left[\begin{array}{c} 1\\ 2 \end{array}\right.$$ is produced by $$\left.\begin{array}{c} 5\\ 6 \end{array} \right] \quad 2\quad \left[\begin{array}{c} 1\\ 2 \end{array}\right.$$ You can make the number smaller and/or add space by including blank lines, e.g. $$\left.\begin{...


You can define macros in MathJax. As far as I can tell, you cannot use numbers in macro names. For example, this defines a macro called \Rsq which then types $\newcommand{\Rsq}{\mathbb R^2}\Rsq$. $\newcommand{\Rsq}{\mathbb R^2}$ $\Rsq$ Macros can also use parameters. For example, the macro define below can be used as $\newcommand{\Map}[3]{{#1}\colon{#2}\to{...


It isn't pretty, but: $$ \left. \begin{matrix} 5\\[5ex] 6 \end{matrix} \right] \begin{matrix} \\ 2 \\ \\ \end{matrix} \left[ \begin{matrix} 1 \\[5ex] 2 \end{matrix} \right. $$ $$ \left. \begin{matrix} 5\\[5ex] 6 \end{matrix} \right] \begin{matrix} \\ 2 \\ \\ \end{matrix} \left[ \begin{matrix} 1 \\[5ex] 2 \end{matrix} \right. $$


In order to get the preferred notation in accordance with ISO 80000-2, use $$\sum\limits_{i = 1}^n {a_i}$$ $$\sum\limits_{i = 1}^n {a_i}$$ However, the following notations are also used $$\sum\nolimits_{i = 1}^n {a_i}$$ $$\sum\limits_i {a_i}$$ $$\sum\nolimits_i {a_i}$$ $$\sum {a_i}$$ $$\sum\nolimits_{i = 1}^n {a_i}$$ $$\sum\limits_i {a_i}$$ $$\sum\...


Yes. Do not type the \textsc part into your answer, and if you copy-paste, then remove it. If you want a less-manual hack, go to the start of your text: M-x replace-regexp <RET> \\textsc{\([^\}]*\)} <RET> \1 <RET> This should do the trick.


Testing: Does the phantom period appear if I simplify it to this? $\forall\,a,b\in\pi_1(S)\cup \pi_2(S)\colon aSb\Leftrightarrow f(a) S' f(b)$. Yes. In this screen grab, see the period after $aSb$, but the period after $f(a) S' f(b)$ is missing.


To make my comments into an answer: Firstly, you can define it manually, so \operatorname{sech}(x) renders as $\operatorname{sech}(x)$. A more fancy way is to put \DeclareMathOperator{\sech}{sech} somewhere in your post, and then \sech will work everywhere in the post. For example, I'll declare the operator (invisibly) here: $\DeclareMathOperator{\sech}{...


Use single dollars and \displaystyle and be sure to place spaces outside the dollars: Text before If I want to write $\displaystyle 2=1+1=2(0.5+0.5)=\sum_{n=1}^40.5=\sum_{n=1}^21$, this is happening but now it looks fine, at least to me, and the paragraph continues neatly. Text after


If you just want to make the fraction smaller, you can write: \tfrac M N $$ \tfrac M N \quad \text{versus} \quad \frac M N $$


Markov Chains This is a heuristic solution for coding Markov chains in Mathjax using a combination of commutative diagrams, the encircle tool and font sizes. There are a few minor issues with this method, for instance the arrows' ends should be attached closer to their targets. Also, it lacks double-headed diagonal arrows and it is difficult to attach ...


That's a feature. The two dollar-sign method is supposed to break the stuff between it onto its own line. Is this what you're trying to do? $$2=1+1=2(0.5+0.5)=\sum_{n=1}^40.5=\sum_{n=1}^21\text{this is happening}$$

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