Introducing LaTeX Math Typesetting

[JonF]

$$\frac{3^{2/3}}{3x^{1/3}*((3x)^{2/3}+2)^{1/2}}$$

 

[JonF]

$$2\pi\int_{2}^{4} (3x^{2/3} +2)^{1/2}*(1 + (\frac{3^{2/3}}{3x^{1/3}*((3x)^{2/3}+2)^{1/2}})^2)^{1/2} dx$$

 

[speeding electron]

How do you write the sign for a line integral around a closed curve?

 

[chroot]

$$\oint f(x) dx$$

- Warren

 

[gerben]

How do you get multiple lines?
I have been trying for hours.
I can only could get multiple lines that were indented to random amount by using "\begin{multline} ...\end{multline}".
just using "//" does not seem to work.

 

[chroot]

gerben,

There are several ways. Examples of all these ways are provided on the first page of this thread. Click the images below to see their source code:

$$\begin{multline*} a+b+c+d\\ +e+f+g+h \end{multline*}$$

$$\begin{equation*} \begin{split} a+b+c+d\\ +e+f+g+h \end{split} \end{equation*}$$

$$\begin{equation*} \begin{split} &a+b+c+d\\ &+e+f+g+h \end{split} \end{equation*}$$

$$\begin{equation*} \begin{split} a+b&+c+d\\ +e+f+g&+h \end{split} \end{equation*}$$

 

[gerben]

Unfortunately, that gives aexactly the same results as using multline (I did indeed mistakenly type "//" in stead of "\\" in my previous post. I do use "//").

$$\begin{gather*} G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\ line 2 \end{gather*}$$

 

[chroot]

Use:

$$\begin{multline*} \begin{split} &G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\ &line 2 \end{split} \end{multline*}$$

as I already said.

Why on Earth are you going to this much trouble just to post text anyway? Why use LaTeX formatting for mostly textual data?

- Warren

 

[gerben]

This does not work:

$$\begin{multline*} G:\ gravitational\ bla\ bla \\ m1:\ your\ mass\\ \end{multline*}$$

 

[gerben]

Well chroot,
I wanted to post a message somewhere, with the following text:

$$\begin{gather*} G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\ m1:\ your\ mass\\ m2:\ mass\ of\ planet \\ r:\ \ distance\ from\ you\ to\ planet\ (from\ centre\ of\ your\ mass\ to\ centre\ of\ planet's\ mass) \\ F_z:\ \ force\ to\ between\ masses\\ \\ F_z\ =\ G\ \frac{m1\ m2}{r^2}\\ \\ on\ earth:\\ m1\ =\ \frac{F_z}{9.8}\\ \\ so,\ on\ planet:\\ m1\ =\ \ G\ \frac{m1\ m2}{r^2\ 9.8} \end{gather*}$$

and I find it really annoying that I cannot get things nicely lined out at the start of the lines. Also some text after "...mass to" (it should have been "...mass to centre of planet's mass") is simply not shown.

 

[chroot]

I've already shown you twice how to do it. Besides, there's really no point in typesetting your entire post in LaTeX. That's really not what we intended our LaTeX system to do at all. Please format your post like this:

G: gravitational constant ($6.672 \cdot 10^{-11}\ Nm^{2}kg^{-2}$)

$$F_z = G \frac{m1\ m2}{r^2}$$

etc.

- Warren

 

[gerben]

Ok, I see that I could do it line by line.
However it would be useful if we could just use the newline command ("/newline" or "//"). I just thought it looked ugly that the different parts of the text in my post were typeset in different fonts. I do not know much about latex but I thought going to a new line would be something fairly basic. Thanks anyway.

I ended up posting my post like this:


Well just disregard the first bracket please (sorry)...

$$\begin{multline*} \begin{slpit} &G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\ &m1:\ your\ mass\\ &m2:\ mass\ of\ planet \\ &r:\ \ distance\ from\ you\ to\ planet\ (from\ centre\ of\ your\ mass\ to\ &centre\ of\ planet's\ mass) \\ &F_z:\ \ force\ between\ masses\\ &\\ &F_z\ =\ G\ \frac{m1\ m2}{r^2}\\ &\\ &on\ earth:\\ &m1\ =\ \frac{F_z}{9.8}\\ &\\ &so,\ on\ planet:\\ &m1\ =\ \ G\ \frac{m1\ m2}{9.8\ r^2} \end{split} \end{multline*}$$

 

[chroot]

Newlines are very basic in normal LaTeX. This is not normal LaTeX. This is math-mode LaTeX with a specific preamble to set up math options, ether math mode, and a specific raster backend to make images that fit into our site layout. All of this makes entering $\int f(x) dx$ easy for our users.

If you really, really had some particular reason to need to use full-blown LaTeX, you can step out of math mode with \] and \[, like this:

$\] This is some sample LaTeX.\\Newlines work fine. \[r=2\] So do paragraph breaks. \[$

But I really ask that you don't do such a thing unless it's absolutely necessary.

- Warren

 

[robphy]

$$\begin{align} x& = y && \text{def}\\ & = y+\textcolor{blue}{(y-y)} && \text{add \textcolor{blue}{zero}}\\ & = 2y-y && \text {\textcolor{red}{algebra}} \end{align}$$

very plain text, slightly^fancier_text, loud text

$\] \begin{picture}(200,200)(0,0)\multiput(0,0)(40,10){5}{\line(1,4){40}}\multiput( 0,0)(10,40){5}{\line(4,1){160}} \put(0,0){\vector(1,4){170}} \put(50,50){\circle*{10}} \put(160,40){\framebox(80,40)[r]{ \textcolor{blue}{\bf \[ x_{Bob} \] } } } \put(40,160){\textcolor{yellow}{\dashbox(80,40)[t]{ \textcolor{red}{ \[ t_{Bob} \] } } }} \qbezier(100,100)(200,100)(200,200) \linethickness{8pt} \textcolor{green}{\qbezier(0,0)(0,100)(100,100)} \linethickness{1pt} \qbezier(0,0)(0,100)(100,100) \end{picture} \[$

$$\newcommand{\VARTEXT}[2][\scriptsize]{\left(\mbox{#1\begin{tabular}{c}#2\end{tabular}}\right)} \VARTEXT[\large]{net-work done \\ on the object } = \VARTEXT[\large]{change in \\ the kinetic energy \\ of the object }$$

 

[chroot]

Cool examples robphy!

- Warren

 

[wisky40]

this is wisky40 I'm not sure about this, but I'm going to try to write something using
Latex...$$E=K\lambda\int_{-a}^a \frac{dx_1}{x_1+x_2+b}$$

 

[ExtravagantDreams]

How do I make this look better

$$a_0 (t)$$

where a₀ is supposed to be a function of t and not a₀ times t.

 

[chroot]

ExtravagentDreams,

It looks fine to me as it is... what do you think is wrong with it?

- Warren

 

[ExtravagantDreams]

$$a_0 (t) \partial a_0 = t^2 \partial t$$
I don't know. I just think it could sometimes be difficult to read and understand if it is ment to be a multiplication or a function of this variable.

I wonder if it would be better to use these {}


such as
$$F_g \{s,t\} = ...$$

Does that conflict with anything else? I don't think I have used any sets in this manner, then again there is much math I have still to see. But I think it would be a little more obvious that it isn't a set instead of it not being multiplication

$$F_g^{ \{s,t\} } = ...$$

$$F_g^{ (s,t) } = ...$$

$$F_g (s,t) = ...$$

$$F_g \{s\} = ...$$

$$F_g (s) = ...$$

try a font size change


$$F_g \mbox{\Large (s,t)}$$

$$F_g \mbox{\large (s,t)}$$

$$F_g^{\mbox{\HUGE (s,t) }} = ...$$

 

[chroot]

The parentheses are standard notation...

$a_0 (t)$ is a function, $a_0 t$ is a multiplication.

- Warren

 

[ExtravagantDreams]

I suppose that is a good point. Now I am having trouble getting the font size to work though

 

[chroot]

$$\mbox{\Huge a_0 t}$$

$$\mbox{\LARGE a_0 t}$$

$$\mbox{\Large a_0 t}$$

$$\mbox{\large a_0 t}$$

- Warren

 

[plover]

All four of those a₀t's are formatted to the same size on my screen.

EDIT: The sizes are fixed now.

 

[zeronem]

If you overload your post with too much latex math writing? Will it come out as errors?

Since, I think I may be doing so. As I was trying to verify in my post how I implicitly differentiated this equation, I used a lot of Latex Math writing to show my work. Then I preview it and it comes out with unsuccessful results.

EDIT MESSAGE: Nevermind, I found a couple of errors in my latex math writing. I fixed them and it came out great.

 

[Gonzolo]

$$v = A\sin(\omega t + \epsilon + \phi) + \sum$$

$$k = \sqrt{\omega\kappa}$$

 

[Gonzolo]

This is just a test.

 

[krolik]

Hello everybody!
Do you know how to write in Latex a big square cap with underlying text like formulas in display math style?

 

[robert Ihnot]

$$\frac{1}{2}sqrt5+1$$

 

[Nenad]

$$1-(v^2 / c^2)$$

 

[chroot]

Tesing for 3.0.3 upgrade:

$$q^2$$

- Warren

 

[chroot]

Another 3.0.3 test

$$r^2$$

 

[chroot]

Another 3.0.3 test

$$m^2$$

 

[chroot]

Another 3.03 test

$$n^2$$

 

[Zorodius]

Just trying to figure out if there's anything in particular screwing things up:

blah blah blah $xy=z$ blah blah

 

[chroot]

Test 3.03:

$$a^2$$ and $$a^3$$

- Warren