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### Problem formatting a subscript in math mode

$\nu_{\rm FWHM}$ prints FWHM too large. But when I try: $\nu_{\mbox{\tiny FWHM}}$ the size is okay but the kerning looks wrong. What is the best way to make a compact little FWHM subscript tag on ...
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### Effectively, how to do “Underbrace” under two “Underbraces”?

Goal: I am trying to find a way to write an equation for: However, I fail, or at least so far could not find a way, to add the last layer in the bottom for "magnetic flux" using \underbrace. Here is ...
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### What exactly does \DeclareOldFontCommand and \DeclareRobustCommand do?

In the article class appears the following code related with the font selection: \DeclareOldFontCommand{\rm}{\normalfont\rmfamily}{\mathrm} \DeclareOldFontCommand{\sf}{\normalfont\sffamily}{\mathsf} \...
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### Redefine underscore to produce roman subscript

I would like to redefine the underscore _ to automatically set subscripts in math mode in roman type, as I currently find myself almost always using _\mathrm{}. I can't find a way of redefining what _ ...
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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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### Difference between \textrm{} and \mathrm{}

Can you explain me what is the difference between \textrm{} and \mathrm{} when they are used in math mode. In what context one is preferred over the other?
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### Text in subscript

For my text-in-mathmode needs in LaTeX, I use \mbox. However, it does not seem to behave well in subscripts. How can I write text that adjusts its height? $3 \mbox{dB} = f_{ 3 \mbox{dB} }$ ...
799 views

### 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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### Textual subscript in math mode

I want to put some short words in certain subscripts when I am in math mode, for example: $W_{total} = \sum{W_i}$ but I think LaTeX understands this as the product of t, o, t, a and l. Is in any ...
621 views

### 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 ...
629 views

### Use upright text in \text within theorem

How to make the text in \text to be automatically upright in a theorem environment? For example, I want to use these codes to get the following effect: \documentclass{article} \usepackage{amsmath} \...