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At least in the case of Lyx 2.1.4, I find that I can simply type \lvert and \rvert into my display formula and Lyx "does the right thing." In my specific case I want absolute value bars around a fraction, so I used \bigg\lvert on the one side and \bigg\rvert on the other side. –
3. Probably you need amsmath's \xrightarrow: after \usepackage{amsmath} you can say. f(n) \xrightarrow{n\to\infty} 0. The condition will go above the arrow, which will be extended to accommodate the condition. If you want the condition below the arrow, use the optional argument: f(n) \xrightarrow[n\to\infty]{} 0.
Aug 10, 2020 · Initially, I simply used. \providecommand{\abs}[1]{\lvert#1\rvert} That was working fine until I needed to take the absolute value of an integral, and the lines did not scale at all. To make the lines scale, I tried. \providecommand{\abs}[1]{\left\lvert#1\right\rvert} This works in the document, but my editor (overleaf) does not like it at all ...
Oct 8, 2017 · 19. You ask for the differences and here's an analysis for them. First let's get rid of the last case: \mid is a relation symbol like = or < and TeX adds spaces around it that disqualify the command from being used for the absolute value. The other two seem good, but the first one is better as it doesn't need precautions.
Apr 20, 2019 · Here's a solution that employs the macro \DeclarePairedDelimiter (provided by the mathtools package) to generate absolute-value "fences" around the summation. I would use \abs[bigg] rather than \abs*, to keep the vertical bars from becoming needlessly large. I would also write \widehat{\Sigma} rather than \hat{\Sigma}, to make the "hat" symbol ...
Feb 7, 2022 · Often in math textbooks when they define an absolute value (or a norm in general) they use the symbol with a dot (even nothing) with some space inside. It looks like this: Whatever method I use to define the absolute value symbol, normally I would only get a narrow spacing unless I define a new command for this special case.
Apr 7, 2022 · ticks = none. \addplot[blue] {abs(x)^{\frac{1}{2}}} \end{axis} \end{tikzpicture} but it does not work. Moreover I need to color the part above the graph with one color and the one below with another (part of the plan). The key point is that \frac typeset the fraction and does not compute it.
Feb 2, 2023 · I'm trying to plot the absolute value of \phi (t) - \phi_n (t) (only done the first one so far), but as far as I can tell, there's no common package that has a built in absolute value function that actually does math instead of just formatting the bars.
To denote the absolute value of some number z, you could type |z|. However, typing \lvert z \rvert is marginally better, as in . a \lvert b \rvert c Observe that there's now no extra whitespace on either side of the bars. Summing up: the vertical heights of the bars produced by \mid on the one hand and \lvert and \rvert on the other are identical.
Mar 23, 2019 · I've been looking for a way to use the \abs command in LyX (Version 2.3.0, using MikTex) but unfortunately I didn't find a solution.
