# Beta test for math rendering
**URL:** https://discourse.julialang.org/t/beta-test-for-math-rendering/4962
**Category:** Meta Discussion
**Created:** [July 20, 2017, 12:59am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962 "2017-07-20T00:59:37Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@vchuravy](https://discourse.julialang.org/u/vchuravy)
#### Post date: [July 20, 2017, 12:59am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/1 "2017-07-20T00:59:37Z")
I just enabled the new discourse math plugin! This is a beta test for now, so please report all problems you encounter here.
Latex math formulas surrounded by `$` or `$$` should render correctly. E=mc^2
Best,
Valentin
PS: I am on vacation till the 25th so please be patient if I don’t answer immediately.
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### Author:  [@dpo](https://discourse.julialang.org/u/dpo)
#### Post date: [July 20, 2017, 1:11am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/2 "2017-07-20T01:11:22Z")
inline: E = mc^2
display:
E = mc^2
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### Author:  [@John\_Gibson](https://discourse.julialang.org/u/John_Gibson)
#### Post date: [July 20, 2017, 2:16am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/3 "2017-07-20T02:16:13Z")
\frac{\partial u} {\partial t }+ u \cdot \nabla u = - \nabla p + \nu \nabla^2 u
\nabla \cdot u = 0
sweet!
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### Author:  [@tshort](https://discourse.julialang.org/u/tshort)
#### Post date: [July 20, 2017, 2:16am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/4 "2017-07-20T02:16:42Z")
In the preview, surrounding by pairs of dollar signs doesn’t work, but single dollar signs are fine.
E = mc^2
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### Author:  [@vchuravy](https://discourse.julialang.org/u/vchuravy)
#### Post date: [July 20, 2017, 3:57am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/5 "2017-07-20T03:57:49Z")
It seems that `$$` can only used as blocks and not inline. You can find
more information about the plugin at:
> **[Discourse Math](https://meta.discourse.org/t/discourse-math/65770)**
>
> :discourse2: Summary Discourse Math uses MathJax (default) or KaTeX to render maths in your Discourse forum. 🛠 Repository Link https://github.com/discourse/discourse-math 📖 Install Guide How to install plugins in Discourse Enabling Math...
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### Author:  [@Evey](https://discourse.julialang.org/u/Evey)
#### Post date: [July 20, 2017, 7:43am UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/6 "2017-07-20T07:43:33Z")
f\_n(x) = n \cdot \begin{cases} f(x - 1) & \text{if } x \> 0, \\ 1 & \text{otherwise}. \end{cases}
\square f^A = -\rho(\varphi, \vec\varrho, \boldsymbol\vartheta) \hspace{2em} \forall A \notin \{\ddot x | \ddot x \> 0, x \in \mathbb J\}
The preview doesn’t update automatically for me if the first line is a `$$` block.
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### Author:  [@Juan](https://discourse.julialang.org/u/Juan)
#### Post date: [July 24, 2017, 2:13pm UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/7 "2017-07-24T14:13:21Z")
i\hbar\frac{\partial}{\partial t} \Psi(\mathbf{r},\,t) = -\frac{\hbar^2}{2m}\nabla^2 \Psi(\mathbf{r},\,t) + V(\mathbf{r})\Psi(\mathbf{r},\,t)
R\_{\mu \nu} - {1 \over 2}g\_{\mu \nu}\,R + g\_{\mu \nu} \Lambda = {8 \pi G \over c^4} T\_{\mu \nu}
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### Author:  [@anon94023334](https://discourse.julialang.org/u/anon94023334)
#### Post date: [July 24, 2017, 2:17pm UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/8 "2017-07-24T14:17:07Z")
bc(v) = \frac{1}{\mathcal{N}} \sum\_{s \neq t \neq v} \frac{\sigma\_{st}(v)}{\sigma\_{st}}
bc(v) = \frac{1}{\mathcal{N}} \sum\_{s \neq t \neq v} \frac{\sigma\_{st}(v)}{\sigma\_{st}}
Just a note: no need to escape backslashes.
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### Author:  [@ExpandingMan](https://discourse.julialang.org/u/ExpandingMan)
#### Post date: [July 24, 2017, 2:21pm UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/9 "2017-07-24T14:21:23Z")
### Yang-Mills
\mathcal{L} \supset i\bar{\psi}\_{a}{\cancel{D}^{a}}\_{b}\psi^{b} - m\bar{\psi}\_{a}\psi^{a} - \frac{1}{4}G\_{\mu\nu}^{a}G^{\mu\nu}\_{a}
Z = \int\mathcal{D}\psi\mathcal{D}\bar{\psi}\mathcal{D}A ~ e^{-\int d^{n}x ~ \mathcal{L}[\psi,\bar{\psi},A]}
### Einstein-Hilbert
S \supset \int d^{4}x\sqrt{-g}~M\_{P}^2(R-2\Lambda)
### Stokes Theorem
\int\_{V} d\omega = \int\_{\partial V}\omega
### Bosonic String
S = \int d^{2}\xi \sqrt{-g} g^{ab}\partial\_{a}X^{\mu}\partial\_{b}X^{\nu}G\_{\mu\nu}(X)
### Celebration
Yay! 🎆
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### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [July 24, 2017, 5:24pm UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/10 "2017-07-24T17:24:57Z")
> [@ExpandingMan](#):
>
> Sean Carroll
You have never used an integration by parts? You could not be more wrong
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### Author:  [@ExpandingMan](https://discourse.julialang.org/u/ExpandingMan)
#### Post date: [July 24, 2017, 5:32pm UTC](https://discourse.julialang.org/t/beta-test-for-math-rendering/4962/11 "2017-07-24T17:32:08Z")
> [@rveltz](#):
>
> You have never used an integration by parts? You could not be more wrong
(It was a joke. It is, in fact, arguably one of the most important theorems in mathematics. Certainly in calculus. Also I might not be remembering the exact quote, I remember Carroll making some comment to this effect in “Spacetime and Geometry” but, again, it was a joke about differential forms.)
I’ve deleted this since I don’t want to be accused of misrepresenting my favorite textbook 😉.