# Does our editor's example equation need to be changed to something else?

+ 1 like - 0 dislike
750 views

Currently, when one clicks the $\TeX$ button while writing a post, one is presented with the example  of a solution to a second-order polynomial equation.

$x = {-b \pm \sqrt{b^2-4ac} \over 2a}$

PolarKernel asked on the thread; Public Beta Feature Requests whether we want a more physics-ish or high-level example equation instead.

I see that we could have one of the following kinds of example equation:

• Functional ones; common examples, like our current example equation.
• Physics-ish fun ones, say, something like $\left\langle \mathcal{T}\left\{ \exp\left(\int \mathrm{d}x^D J_{4D}(x)\mathcal{O}(x)\right) \right\} \right\rangle_{\mathrm{CFT}} = Z_{\mathrm{AdS}}\left[\lim_{\mathrm{boundary}} J \omega^{\Delta-D+n } = J_{4D}\right]$ (from AdS/CFT)
• Commonly used, useful equations, e.g. Dirac Field Lagrangian, or Polyakov Action, or something like that.
• Solely to show some of the features of MathJax; e.g. ${\mathcal{L}} = \left[ {\begin{array}{*{20}{c}}{2k\sum\limits_\pi ^\infty {{\Gamma ^{\int {\rm{d}} {\mathbb{F}}}}} }&0\\0&1\end{array}} \right]$
• Something creative and fun; here's a dumb thing I thought of: $\bf{{MaThJaX}^{-1}\lvert p\hbar0\rangle}=0$.

Commonly used equations may be advantageous because they may reduce equation-typesetting time. But with different conventions used, etc., it may not turn out to be very useful eventually.

Physics-ish equations may help ward off low-level questions, and give the message that "this is not the place for your question", which is good.

The creative and fun things are useless but fun.

So, please propose example equations, or say "I'd rather stick to our current, functional, example equation." if you prefer.

Haha, the one from AdS/CFT is cool :-)

@Dilaton I have proposed it below.

$\left\langle \mathcal{T}\left\{ \exp\left(\int \mathrm{d}x^D J_{4D}(x)\mathcal{O}(x)\right) \right\} \right\rangle_{\mathrm{CFT}} = Z_{\mathrm{AdS}}\left[\lim_{\mathrm{boundary}} J \omega^{\Delta-D+n } = J_{4D}\right]$
 Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead. To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL. Please consult the FAQ for as to how to format your post. This is the answer box; if you want to write a comment instead, please use the 'add comment' button. Live preview (may slow down editor)   Preview Your name to display (optional): Email me at this address if my answer is selected or commented on: Privacy: Your email address will only be used for sending these notifications. Anti-spam verification: If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:p$\hbar$ysicsO$\varnothing$erflowThen drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds). To avoid this verification in future, please log in or register.