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### Standard for typesetting mathematical objects other than variables

Is there a standard in mathematics for typesetting the textual (not symbolic) identifiers of mathematical objects other than variables? Textual identifiers of mathematical objects other than ...
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### How do I get upright text as a subscript?

I want my subscript to be upright, so T and not as in $T$. How do I do it? \documentclass{article} \begin{document} How can I get the subscript in $\Pr_T$ as T and not as in $T$? \end{document}
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### Should superscript and subscript be upright in this case? [duplicate]

What do you think which notation is better to read? The set $B^{high} = {b_1, \ldots, b_n}$ should indicate the set of all buildings which are high and $B^{low} = {b_1, \ldots, b_n}$ all buildings ...
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### How to multiply a fraction

I have an equation in which inside I have a fraction. I want to put a number (3.3) that indicates multiplication. \begin{eqnarray} \phantom{0}LOD = \frac{\phantom{0}S}{N} = 0.1\phantom{0} \si{\ng/\...
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### Difference between \mathrm, \operatorname and \text? [duplicate]

Possible Duplicate: What’s the difference between \mathrm and \operatorname? I am a beginner of latex, and am always having a hard time differentiate these commands since they seem always produce ...