 Roleplaying Video Games Entertainment & Media Politics & World
General Spirituality & Philosophy Worldbuilding Creative Forum
The Sports Center Science, Math, & Technology The Nostalgia Forum Sexuality

# Science, Math, & Technology

## latex support added (again in 2021)

Posted Over 6 Years ago by Riven

Evidently you use backslashes for everything (Is this a latex-specific thing, or a mathjax-specific thing?)

Turns into

$\left( \sum_{k=1}^n a_k b_k \right)^{\!\!2} \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$

Inline LaTeX

You can use LaTeX inside of a paragraph as well by surrounding it by $$<latex>$$.

The quick brown fox $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ jumps over the lazy red dog.

turns into

The quick brown fox $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ jumps over the lazy red dog.

Conclusion

If there's anything I'm leaving out (likely) let me know!

## There are 61 Replies

You are an Angel of the Lord. {O:-)} Thank you for your kindness, Xhin. We truly appreciate this.

About your first question, yes, the command \ [ ... \ ] are used in LaTeX. In fact I use it all the time. Other times I use the double dollars you mentioned. When I want a displayed equation to be numbered I use the environment variable: \ begin{equation} .... Equation goes here ... \ end{equation} Hey that worked! Over 6 Years ago The Fly Interesting... Over 6 Years ago GHOW Oh neat, I didn't think about spacing out the backslashes. That's good! I used the  trick for the $$thing (after a little tweak to get it to render as <em></em> instead of literally nothing). Over 6 Years ago Riven Yeah, I had to put a space after the \ since it did work otherwise! {;)} Let me test ... \pi^{-1/2}. So one dollar doesn't work. So it needs more money two dollars!$$\pi^{-1/2}$$Yup! Worked! I see you TeXed the Cauchy-Schwartz inequality! We're gonna teach the people of GT to do some TeXing here. You said it! This is gonna be TeXan land from now on! ;-) Over 6 Years ago The Fly Yeah it doesn't work with single dollar signs. And you wouldn't want it to, really.. Over 6 Years ago Riven This is a t$$\epsilon$$st. This is a t\epsilonst. This is a t$\epsilon$st.$$\tau \epsilon \Sigma \tau$$Over 6 Years ago EN I've got the mathjax showing up on the left now where it belongs. Over 6 Years ago Riven When I've used other Latex supporting sites like stackexchange, single dollar signs let you do inline code, while double dollar signs gives you a separate centered paragraph. Any chance we could get that sort of inline functionality? Over 6 Years ago EN Also my OP was wrong about inline math. You apparently just use the backslash syntax for it. there are two solutions to $$ax^2 + bx + c = 0$$. Over 6 Years ago Riven Yeah inline math is supported by default really.. Over 6 Years ago Riven That's ok, I'm not at all worried about the single . I'm not familiar with mathjax. Can you find this integral? $\int_0^\infty e^{-2x} dx$ Over 6 Years ago The Fly This is a t$$\epsilon$$st. Over 6 Years ago EN So backslash parenthesis is the same as single dollar sign. Cool. Thanks, Xhin. Over 6 Years ago EN I see Xhin used the command \ (ax^2 + bx + c = 0\ ) without the spaces after \ to get the math in undisplayed format. Let me test it. Over 6 Years ago The Fly So backslash parenthesis is the same as single dollar sign. Cool. Thanks, Xhin. I second that. Makes it so much easier. I'm gonna have to pin this thread! For people to see and read these simple instructions. {y}{y}{y} to Xhin! Over 6 Years ago The Fly And Xhin, sometimes quadratic equations only have one solution (though in that case it has multiplicity two).$$X^{h^{i^n}}X_{h_{i_n}}$$Over 6 Years ago EN The set consisting of y is $\{y\}$ is now no longer confused with {y} ! Over 6 Years ago The Fly$$ \begin{align*} \Pr\left(\cap_{i \in [N]}(S_i=0) \right) &= \Pr\left(\cap_{i \notin J}(S_i=0) \right) \\ &= 1-\Pr\left(\cup_{i \notin J}(S_i=1) \right) \\ &\ge 1-\sum_{i \notin J} \Pr(S_i=1) \\ &= 1-(N-t)(1-1/t)^t \\ &\ge 1-(N-t)/e \end{align*} $$Over 6 Years ago EN I have to say that I'm impressed with how Xhin got LaTeX to work! $\frac{\partial}{\partial x}$ Over 6 Years ago The Fly EN you're TeXing away !! {y} Here's the Schrodinger equation of quantum mechanics: $\Large i\hbar \frac{\partial\psi}{\partial t} = H\psi.$ Over 6 Years ago The Fly$$P(Pass)=P(H \ge T) \le \frac{E[H]}{T}=\frac{.5E}{T}=\frac{q^2}{2NT}$$Over 6 Years ago EN You can even use the \ large and \Large and \ LARGE commands to make equations bigger! I just did to make the Schrodinger equation bigger. Over 6 Years ago The Fly It's like suddenly I can talk and there's so much to say. Over 6 Years ago EN LOL. You're not alone! {:D} Now I feel like a little boy! Over 6 Years ago The Fly Let $$\large{}_AX_B$$ be a bimodule over rings $$A, B$$. And form the tensor product $$\large X \otimes_B Y$$ over B. Over 6 Years ago The Fly$$\LARGE\bigstar$$Over 6 Years ago EN $$\textcolor{blue}{Words go here}$$ Over 6 Years ago The Fly$$ \usepackage{simpson} \homer Over 6 Years ago EN To anyone reading this and who is interested, to find out how we formatted a certain equation, just click the Edit link of that post to see how that person wrote it. $\Large \text{Big Words HERE!}$ oops that stretched the page! $\LARGE\text{How about Bigger Words!}$ $\LARGE\text{This is What I call a PARTY!!}$ (ok, a math party!) Over 6 Years ago The Fly The ring of integers $\Large \mathbb Z = \{1, 2, 3, \dots \}$ All functions from the integers to the integers: $$\Large \mathbb Z^{\mathbb Z}$$. Over 6 Years ago The Fly $$\heartsuit ~ \bigstar ~ \Omega ~ \clubsuit$$ $$~ \Large \bullet$$ $$~ \Phi ~ \bigcap$$ $$~ \rho$$ Over 6 Years ago EN Can anyone guess what I was getting at in the last reply? Over 6 Years ago EN Greek Letters now come alive! $$\LARGE \alpha \ \beta \ \gamma \ \Gamma \ \delta \ \Delta \ \pi \ \Pi \ \mu \ \nu \ \omega \ \Omega \ \sigma \ \Sigma$$ Over 6 Years ago The Fly By the way, this is a great site to figure out the command to type a symbol that you want but don't know the name of. You draw the symbol you want and it suggests symbols that look like what you've drawn: http://detexify.kirelabs.org/classify.html Over 6 Years ago EN You can use \ with a space after it in TeX to create one spacing, and you can do this \ \ to get two spaces, etc. If you want more you can use the \hskip10pt command and replace 10 by any number. E.g., $$A \hskip20pt B$$ Here I used the hskip with 20 points. Over 6 Years ago The Fly $$\eta$$ Over 6 Years ago GHWI GHWI, try surrounding your eta like this \ ( \eta \ ) without the space after the \'s. Over 6 Years ago The Fly Commutative diagrams can be created by \CD ... but I have to recheck. Over 6 Years ago The Fly Yay! I did it. Over 6 Years ago Ghowilo Welcome to the world of $$\large \LaTeX$$! Over 6 Years ago The Fly Now we can have matrices! $\Large \left[\begin{matrix} a_{11} & a_{12} & a_{13} & \cdots & a_{1n} \\ a_{21} & a_{22} & a_{23} & \cdots & a_{2n} \\ a_{31} & a_{32} & a_{33} & \cdots & a_{3n} \\ \vdots & \vdots & \vdots & \ddots & \vdots \\ a_{n1} & a_{n2} & a_{n3} & \cdots & a_{nn} \end{matrix}\right]$ Click on Edit $$\large \longrightarrow$$ to see how it works. $$\large \longrightarrow$$ $$\large \longrightarrow$$ .... $$\large \longrightarrow$$ I made it large. Over 6 Years ago The Fly http://detexify.kirelabs.org/classify.html Great learning tool, EN, thanks! Very easy to use. Hey you guys go to this sight and write alpha and you'll get the TeX command for it -- it also gives you other alternative commands for similar symbols. Over 6 Years ago The Fly I often use the \ align command so that a set of equations are aligned together like this \begin{align} a^2 + b^2 &= \alpha^3 \\ c^5 &= \alpha^2 + \gamma^2 \end{align} You notice the = signs are aligned. Click on Edit $$\large \longrightarrow$$ to see how it's done. Over 6 Years ago The Fly $$\Large\text{PLEASE NOTE:}$$ I unstickied two of Yeano's threads that were at the top but they're still on the front page in the Announcements box just below the title of the forum. I sticked this Xhin's thread since it would be a good resource reference to have for those who want to refer to, or be reminded of, some LaTeX commands. Over 6 Years ago The Fly Let $$X$$ and $$Y$$ be topological spaces. Let $$f,g : X \rightarrow Y$$ be two continuous functions. A homotopy from $$f$$ to $$g$$ is a continuous function $$H: X \times I \rightarrow Y$$ such that $H\left(x,0\right) = f\left(x\right) \forall x \in X$ $H\left(x,1\right) = g\left(x\right) \forall x \in X$ Over 6 Years ago Yeano $\usepackage{xypic} \xymatrix{ A \ar^{f} \ar[d]_{g} & B \ar[d]^{h} \\ C \ar_{i} & D }$ Over 6 Years ago Yeano We might ask to see if Xhin can include some basic packages in the LaTeX preamble like xypic so that maybe we can get commutative diagrams to work. Over 6 Years ago The Fly Sure, I'll look into it! Over 6 Years ago Riven Thanks Xhin! In my TeX files I often have the following lines mentioned at the beginning of the preamble to enable the use of the packages that they refer to. For example, in addition to Yeano's xypic, I have these packages/inputs: \usepackage[usenames]{color} \usepackage{amssymb} \usepackage{amscd} \usepackage{array} \usepackage[]{graphicx} \input xy \xyoption{all} \usepackage{epsfig} Loading packages is easy since all it means is that it alerts TeX to take account of a package by virtue of its name! You tell it the name of the package and it knows what to do. Over 6 Years ago The Fly Hmmm, maybe the psfig can be excluded since it refers to a file on my hard drive ... but I never tried to see if it can reference a hyperlink image. We don't need to since we have the [ img ] feature on GT, so we can ignore psfig. Over 6 Years ago The Fly It really doesn't like this equation for whatever reasonI_{zz}^* = \int {x^2 + y^2)dm\$

Over 5 Years ago
Ghowilo

I figured out why

Over 5 Years ago
Ghowilo

I will have to figure this out and try it.

5 Months ago
chiarizio

/roll

5 Months ago
tnu

This isn't currently working on the new site. It will be soon enough though.

5 Months ago
Riven

Thanks!

5 Months ago
chiarizio

This is working again, only this time sitewide.

This isn't the best solution for general-purpose formatting (especially since the documentation for TeX is so clunky), but it's a good step in the right direction.

4 Months ago
Riven

This should also play reasonably nicely with the new [color] tag:

[color pink] (~ heartsuit ) [/color] [color bg:yellow 000] (~ bigstar ) [/color] [color 037 bg:111] (~ Omega ) [/color] [color 000 bg:fff] (~ Large clubsuit ) [/color] [color afa] (~ Phi ) [/color] [color 792 bg:216] (~ bigcap ) [/color] [color maroon] (~ rho ) [/color]

$$~ \heartsuit$$ $$~ \bigstar$$ $$~ \Omega$$ $$~ \Large \clubsuit$$ $$~ \Phi$$ $$~ \bigcap$$ $$~ \rho$$

4 Months ago
Riven

Great!
Sometime when I’m not so tired I need to play with this a bit to see if anything I’ve posted here would be clearer if I used LaTeX on it.

4 Months ago
chiarizio

I think it's more likely that some kind of charting software integration would work better. The LaTeX stuff should be useful for notating things though.

4 Months ago
Riven

@Riven:
You’re probably right.

4 Months ago
chiarizio

# Semi-permanent Lockdown

Accounts are required to post for the forseeable future. Contact me through discord for account issues or registration: Riven#7868