# Tag Info

27

Testing alternate way of implementing spoiler $$\require{action} \require{enclose} \toggle{ x\cdot 0 = 0\quad\enclose{roundedbox}{\text{ Click this for derivation }} }{ \begin{array}{rll} x\cdot 0 &= \mathtip{x\cdot 0 + 0}{0 \text{ is additive identity}} \\ &= \mathtip{x\cdot 0 + (x\cdot 0 + -(x\cdot 0))}{ -(x\cdot 0) \text{ is additive inverse ... 18 There are three approaches for line breaks. As pointed out in the comments, Approaches 2 and 3 produce the same HTML output when rendered on the page. Approach 1: Press "Enter" twice Output: Hi Bye Code: Hi Bye Approach 2: Two spaces at end of line Output: Hi Bye Code: Hi Bye There are two spaces after "Hi." That is, the text looks like: Hi&... 16 A problem is that it is not a semantically correct use. At the moment the formatting used by SE on this site for block-quotes is such that optically its usage for emphasis makes sense. Yet, this could change at any point in time. Moreover, already now I feel it is not really the case on the mobile site. In addition, imagine some machine reads the site to ... 13 Simple solution: don't abuse MathJax to colour your text. 12 The commands \lbrack and \rbrack are macros that produce [ and ] respectively, and MathJax has no problem when you use them instead of the symbols - see the comment below, which was produced by For any a,b\in \lbrack 0,x): a\vee b exists. Namely, a\vee b=\max\{a,b\}. You might be asking about when directed sets are [complete](http://en.wikipedia.org/... 11 Use mathjax for mathematics, not for text formatting. The mathjax italics happen because mathjax thinks "abcde" is just a string of variables. 9 I've gone an updated the CSS for spoilers - there was something overriding the spoiler CSS in this instance. With you in the next build (rev. 2017.3.14.*) 9 So it seems that tables are now enabled here. Here is a CW-answer for testing how they work with MathJax. A header Another header Limit \lim\limits_{x\to\infty} f(x) Matrix \begin{pmatrix}1&2\\0&1\end{pmatrix} Cardinals \mathfrak c^{\aleph_0}=\mathfrak c More tests Mathjax Equation with a tag x^2+y^2=z^2 \tag{1} \end{... 8 When I look at the specific comment you linked to, I think that the only problems is that you did not include http:// at the beginning of the link. You wrote this: [ArtOfProblemSolving forum](www.artofproblemsolving.com/Forum/viewtopic.php?p=3542095&sid=61650444d5d??5e56fb5c71a50982e4912#p3542095) which does not work: ArtOfProblemSolving forum. If you ... 7 Move your mouse around each symbol to know which font was used:$$\require{action} \overset{\rlap{\overset{\,{\rlap{\overset{\overset{\overset{\color{red}{\rlap{\color{\green}{\,\,\star}}{\Rule{1em}{0.5em}{0.25em}}}}{}}{}}{}}{\Huge|}}}{}}{\Rule{0.5em}{0.25em}{0.05em}}}{\overset{\Rule{2em}{0.05em}{0.05em}}{\overset{\Rule{5em}{0.05em}{0.05em}}{\overset{\Rule{...

7

This answer to a similar question (as linked to in the comments by Martin Sleziak) suggests the hack of $$\tag*{\blacksquare}$$, which looks like the following: ...and the proof is complete. $\tag*{$\blacksquare$}$ Frustratingly, it takes a new line. But I do not think this is an issue, as issues go!

7

The former is a block quote the later is a spoiler. There is also preformatted text, which might qualify. It looks like this. This is preformatted text. It is especially useful for code. You can get it by indenting the text with four spaces. A feature or issue with this is that it will not break you lines, but instead will add a slider. Like this. This ...

6

It seems to be that if you do >! at the beginning of a line, you get that. You could have found that out by clicking edit post and looking at the source. for example.

6

(This is a CW answer, everybody is welcome to extend or improve it.) Markdown support for tables has been enabled network-wide, this offers an alternative to the MathJax/LaTeX array environment for simple tables. MathJax can be used inside the Markdown table entries. A simple example Source: | Function | Addition theorem | | -------- | ---------------- | | **...

6

Line-breaks and paragraphs in comments are not supported. The shift-enter is intended only to affect the situation while you edit. It is possible to work around this restriction via using MathJax. But doinng so is discouraged. If you need some visual separation, use some symbols for example // like this: This is one important remark I want to make and ...

6

You can use a double space at the end of each line to force a newline: >! Here is the proposed workaround: >! >! 1. The first $n$. >! 2. The second $k$. This will preserve the formulas as well:

5

What a lovely diagram. $$\require{AMScd} \begin{CD} H \otimes M @>{\rho}>> M @>{\delta}>> H \otimes M \\ @V{\Delta^2 \otimes \delta}VV @. @AA{m^2 \otimes \rho}A \\ H^{\otimes 4} \otimes M @>>{\mathbb{1} \otimes T \otimes \mathbb{1}}> H^{\otimes 4} \otimes M @>>{\mathbb{1}\otimes\mathbb{1}\otimes S \otimes\mathbb{1}... 5 No downvotes! \hskip -3.5em \color{red}{\Rule{3em}{4.5em}{0em}} \overset{\cdot\cdot}\smile$$ \require{action} \require{enclose} \toggle{ \quad\enclose{roundedbox}{\text{ Why I cannot see the votes or vote? }} }{ \quad\quad \bbox[4pt,border: 1px solid red]{ \begin{array}{l} \text{Because the answer has said so that you should not be able to click the ...

5

How does the following change if I want to reference a posted Math Stack Exchange question or page? If you want to reference a Math Stack Exchange question in a post it suffices to paste the URL into the post. What will be displayed is the title of the question. This work for posts (questions and answers) yet not for comments. You can also use any ...

5

In Markdown help - comment formatting you can read that Comments support only bold, italic, code and links; in addition, a few shorthand links are available. _italic_ and **bold** text, inline code in backticks, and [basic links](http://example.com). And also *italics* works for italics. In the linked help you can find more details also about ...

4

$\def\col#1{\color{#1}{\text{#1}}}\col{white}$ I am testing whether there are any uses of the #rrggbb color notation to represent usefully distinguishable colors. Certainly $\col{#d10000}$ is distinguishable from $\col{#df0000}$, but the former is indistinguishable from $\col{#d00}$ and the latter from $\col{#e00}$. Red $$\col{#000}\col{#080000}\col{#... 4 Country Flags (to be put in your profile) Some codes are too long to fit in the location section, that's why I'm working on making less long codes. \checkmark denotes ones that can fit in. Example: \phantom{XXXXX} \checkmark Morocco Preview: (don't use the codes associated with the previews, instead use the ones written under)$$\Huge\:\color{red}...

4

From what I can tell, your link contains an "en dash" between Sturm and Liouville, and it is this character that is causing the problem. Replacing it with the ordinary "hyphen-minus" - seems to work: original: http://en.m.wikipedia.org/wiki/Sturm–Liouville_theory hyphen-minus: http://en.m.wikipedia.org/wiki/Sturm-Liouville_theory The same problem appears ...

4

It definitely has to do with the MathJax combination. The same code block causes a problem in preview on Physics.SE, which also uses has MathJax enabled. But the code block does not cause a problem on TeX.SE, which does not have MathJax enabled.

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