LaTeX Introducing LaTeX Math Typesetting

[arildno]

Try this one \approx

 

[chroot]

Machinus,

Look at the pdf file: https://www.physicsforums.com/misc/howtolatex.pdf

- Warren

 

[Machinus]

Yes, I d/led that pdf but I was having some trouble with acrobat. I think it is better now though. Thanks.

 

[Tom McCurdy]

test

a= \fraq{b}{x}

 

[Tom McCurdy]

\frac{1}{5+2}

 

[Tom McCurdy]

Vosin45-gt=0

Vosin45=gt

t= \frac{Vosin45}{g}

since you need to muliply by 2
t= \frac {\frac{2\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2}\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2} }{g}

t= \frac{Vo\sqrt{2}}{g}

 

[chroot]

From now on, please use the "Post Preview" feature to test your LaTeX, rather than wasting server space by posting it here. Please post any additional questions about our LaTeX system to the Feedback forum. Please post any additional questions about LaTeX itself to the General Technology Forum.

- Warren

 

[thegame]

testing...
<br /> \begin{array}{r l r l}<br /> u &amp;= \ln x \quad &amp; dv &amp;= x\,dx \\<br /> du &amp;= \frac{1}{x}\,dx &amp; v &amp;= \frac{1}{2} x^2<br /> \end{array}<br />



<br /> \begin{array}{r l r l}<br /> sqrt{a_A^2+b_B^2}<br /> \end{array}<br /> [\tex]

 

[BLUE_CHIP]

\ddot{x}=-\omega^{2}{x}
T=\frac{2\pi}{\omega}
\ddot{x}
T
\omega
I=\frac{1}{2}MR^{2}
I
M
R
I=\frac{1}{2}MR^{2}+4mr^{2}
m
r
T_{v}=2\pi\sqrt{\frac{k}{m}}
T_{r}=2\pi\sqrt{\frac{I}{c}}
T
k
c

 

[RadiationX]

x^2\sqrt{x}\int

 

[BLUE_CHIP]

T_{r}=10.8-8.1
T_{r}=2.7
T_{r}
T_{v}
T_{r}=T_{v}
T_{r}^{2}\propto{I}

 

[jasonc65]

\langle p_1 | p_2 \rangle = \langle 0 | a(p_1) a^{\dagger} (p_2) | 0 \rangle = \delta (p_1 - p_2)
\langle x^1 | x^2 \rangle = \langle 0 | \varphi (x^1) \varphi ^{\dagger} (x^2) | 0 \rangle = \delta (x^1 - x^2)
T^{\mu \nu} = g^{\nu \sigma} {T^{\mu}}_{\sigma}

 

[rsixtyone]

Testing LaTex

This is just a test to see if it works.


A=[A\angle\theta_{A}]

 

[phreak]

\sum_{n=1}^\infty \frac{1}{n}-\frac{1}{n+1}

 

[Raza]

2 Li_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 LiOH_(_a_q_) + H_2_(_g_)
2 K_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 KOH_(_a_q_) + H_2_(_g_)
Ca_(_s_) + 2 H_2O_(_l_) \xrightarrow~Ca(OH)_2_(_s_) + H_2_(_g_)
Na_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 NaOH_(_a_q_) + H_2_(_g_)
Mg_(_s_) + 2 H_2O_(_g_) \xrightarrow~Mg(OH)_2_(_s_) + H_2_(_g_)
2 Al_(_s_) + 6 H_2O_(_g_) \xrightarrow~2 Al(OH)_3_(_s_) + 3 H_2_(_g_)
Fe_(_s_) + CuSO_4_(_a_q_) \xrightarrow~FeSO_4_(_a_q_) + Cu_(_s_)\xleftarrow~

 

[rachmaninoff]

\Gamma(z)=\int^{\infty}_0t^{z-1}e^{-t}dt

 

[Kea]

test

Let me try

\xymatrix @=15mm {T \hspace{2mm} \ar@{&gt;-&gt;}[r]_{f}<br /> \ar[d]^{!} &amp; S \ar[d]_{\chi} \\ \{ \ast \} \ar[r]^{t} &amp; \{ 0,1 \}<br /> }

Oops. Can we have the xy package at some future date?

Cheers
Kea

 

[rachmaninoff]

Test:

(AB)C=([a_{ij}]\times[b_{ij}])\times[c_{ij}]=[\sum_{k=1}^{n}a_{ik}b_{kj}]\times[c_{ij}]=[\sum_{l=1}^{p}(\sum_{k=1}^{n}a_{ik}b_{kl})c_{lj}]=[\sum_{l=1}^{p}(\sum_{k=1}^{n}a_{ik}b_{kl}c_{lj})]
=[\sum_{k=1}^{n}(\sum_{l=1}^{p}a_{ik}b_{kl}c_{lj})]=[\sum_{k=1}^{n}a_{ik}(\sum_{l=1}^{p}b_{kl}c_{lj})]=[a_{ik}]\times[\sum_{l=1}^{p}b_{kl}c_{lj}]=[a_{ik}]\times([b_{ik}]\times[c_{ik}])=A(BC)

 

[marcus]

a test
\not G

how do you put a slash thru a letter? anybody?
I just want a distinguished G, slash isn't so good, so I will try some others

\widehat{G}

\tilde{G}

\overline{G}

\mathbb{G}

 

[marcus]

I see Ambitwistor has made some slashes but it seems very involved so maybe let's forget about it and try something else

<br /> \def\pds{\kern+0.1em /\kern-0.55em \partial}<br /> \def\lts#1{\kern+0.1em /\kern-0.65em #1}<br /> {\cal L}_R = \sum_{i=1}^G<br /> \bar{E}^i_R(i\pds<br /> - g_1Y_E \lts{B})E^i_R +<br /> \bar{D}^i_R(i\lts{D}<br /> - g_1Y_D \lts{B})D^i_R +<br /> \bar{U}^i_R(i\lts{D}<br /> - g_1Y_U \lts{B})U^i_R)<br />

There's actually a whole 'slashed' package for this...

I want a distinguished G symbol. I'll try some more alternatives

\mathcal{G}

\mathbb{G}

\mathbf{G}

\mathsf{G}

 

[JesseM]

How come I when I try to edit my code, the changes don't show up in the post? In this post I wanted to change that \frac{dx}{d\tau} in the second line of the Brian Greene quote into dx/d\tau, so I changed the code in the edit window, but it still shows up like the first version on my screen.

edit: I checked back a few hours later, and now the edited version appears onscreen. But then I made another edit, and again the graphics were not updated, even if I hit "refresh" or quit my browser and returned to the page. Is there a delay in how quickly LaTeX graphics are updated or something?

edit 2: never mind, I figured out that if I clear my browser's disk cache before hitting "refresh", the graphic gets updated correctly, so that must have been the problem.

 

[clive]

a^n


I would like to write equations too...am I missing something?

 

[chroot]

clive:

Be careful. You need a a forward slash, not a backslash, in your closing [ tex ] tags.

Type this, but omit the spaces:

[ tex ] a^n [ /tex ]

- Warren

 

[Gokul43201]

I've wondered about slashes too...especially for symbols representing "not equal" (which can be got around), "not congruent" (need a slash through \equiv), "not divisible by" (or "does not divide" which is a slash across a vertical line).

Do these symbols exist (haven't seen them in any library, but I haven't looked carefully) or does it take some trick to generate them ?

 

[Gokul43201]

<br /> \def\lts#1{\kern+0.1em /\kern-0.65em #1}<br /> \lts{\equiv}~~~ \lts{=}~~~\lts{~|}~~~\lts{\vert}

Hmmm...That didn't work too well. Can I change the position of the slash ?

 

[clive]

Thanks chroot,

\bigtriangledown ^2 \phi=\sqrt{t^2+1}

What a wonderful world...

 

[Gary King]

This is very cool How can I put this new addition on my vBulletin forums as well?

Thanks in advance!

 

[Janitor]

Ten forward gears and a Georgia Overdrive

Let's see...

\pi * e \oint D^4 f \bigwedge F(\overline {\tau}) \approx \underbar {X}, whence

G_i \oplus G_j = \emptyset \bigcap \ker(\alpha) \longleftrightarrow \sigma ^i^j \in SU(4).

 

[HawkeyeCoug]

Latex for Statistical Mechanics

I am trying to do a formula sheet for statistical mechanics. Our professor uses a dashed-d to represent a perfect differential, which I have had trouble making. I did overwrite a d with a ^{\smallsetminus}, but the construct I was using (copied from a website) caused problems. Anyone have a non-problematic overtype?

Also, his notation is to use a line at the end of a derivative with subscripts representing the variables held constant. I can't get |, \vert, \right|, or \mid to work correctly. Has anyone solved this?

Thanks so much for your help in advance.

 

[The Divine Zephyr]

\int_{1}^{\sqrt[3]{3}}z^2dz \times \cos{\frac{3\pi}{9}}=\ln{\sqrt[3]{e}}

Integral z squared dz
from 1 to the cube root of 3
times the cosine of 3 pi over 9
equals the log of the cubes root of e


Whoever thought that up was a really clever math poet ;)

 

[ReyChiquito]

quick q.

instead of having something like this

\int_{\|\vec{X}-\vec{Y}\|=\epsilon}

can i make the \|\vec{X}-\vec{Y}\|=\epsilon} right beneath the \int sign?

the same here, instead of

\nabla_X

i want the X beneath the nabla sign

thx :)

 

[z-component]

This is very cool How can I put this new addition on my vBulletin forums as well?

Thanks in advance!

Gary, this addition is not a standard addon for vBulletin. The administrators have added the LaTeX system themselves. More information on LaTeX, http://www.latex-project.org.

 

[The Divine Zephyr]

\int \frac{3}{4+3x^2}dx=\frac{1}{2}\sqrt{3}\arctan(\frac{x\sqrt{3}}{2})+C

 

[quantumdude]

Question:

Is it possible to make Venn Diagrams with LaTeX?

 

[Janus]

Question:

Is it possible to make Venn Diagrams with LaTeX?

Yep, you can use the picture enviroment, like thus:

<br /> \begin{picture}(400,400)<br /> <br /> \put(80,80){\circle{40}}<br /> \put(100,80){\circle{40}}<br /> \put(90,100){\circle{40}}<br /> \put(65,70){A}<br /> \put(105,70){B}<br /> \put(85,105){C}<br /> \end{picture}<br />

Though the "oval" might be more versatile:

<br /> <br /> \begin{picture}(500,500)<br /> <br /> \put(290,260){\oval(100,100)}<br /> \put(330,280){\oval(100,100)}<br /> \put(280,310){\oval(100,100)}<br /> \put(260,240){A}<br /> \put(350,240){B}<br /> \put(260,330){C}<br /> \end{picture}<br />

 

[ReyChiquito]

\int \atop \|\vec{X}-\vec{Y}\|=\epsilon

\nabla \atop X

there has to be a better way

 

[arildno]

\int \atop \|\vec{X}-\vec{Y}\|=\epsilon

\nabla \atop X

there has to be a better way

You have the "stackrel" option
\stackrel{\nabla}{X}

 

[ReyChiquito]

thx mate... I am still not convinced though... ill get it right someday :)

 

[Norman]

anyone know how to do a contraction symbol from QFT (as in Wicks Theorem)? It is basically a square brace on top of the charecters connecting 2 charecters that are not necesarily next to each other?

 

[ReyChiquito]

\iint\limits_\Omega

\int\limits_{\|\vec{X}-\vec{Y}\|=\epsilon}

\mathop{\nabla}\limits_X

all right!

 

[gnome]

how do I set up a case-by-case function definition, i.e.
...{ a if y<1
x = { b if 1&le;y<2
...{ c otherwise

The \cases command doesn't seem to work here.

 

[jcsd]

x =\left\{\begin{array}{ccc}a&amp;\mbox{ if }<br /> x&lt;1\\b &amp;\mbox{ if }1\leq y &lt;2 \\c&amp;\mbox{ otherwise}\end{array}\right

 

[gnome]

Thanks. Any way to get the "ifs" aligned?

edit: nm; I seem to have gotten it.

 

[jcsd]

Yes, I couldn't work it out at first (for info here it is:)
x =\left\{\begin{array}{lll}a&amp;\mbox{ if }<br /> x&lt;1\\b&amp;\mbox{ if }1\leq y &lt;2 \\c&amp;\mbox{ otherwise }\end{array}\right

 

[houserichichi]

TexAide

This is copied (and edited) from TeXaide (which works exactly like Microsoft Equation Editor)

<br /> x\sum\limits_{i = 0}^\infty {\left( {\begin{array}{*{20}c}<br /> a &amp; b &amp; c \\<br /> {a \times a} &amp; {b \otimes b} &amp; {c\langle c^c \rangle } \\<br /> {a_{\aleph _0 } } &amp; {\wp \left( b \right)} &amp; {\bigcap\limits_c {\Re ^c } } \\<br /> \end{array}} \right)} \frac{\partial }{{\partial x}}\mathop \oplus \limits_x \bigcup + 6\mathop{\left){\vphantom{1{12}}}\right.<br /> \!\!\!\!\overline{\,\,\,\vphantom 1{{12}}}}<br /> \limits^{\displaystyle\hfill\,\,\, 2}<br /> \

Can't seem to figure out where that last "]" comes from at the end, but alas - it worked like a charm. Shame that all means nothing!

 

[The Divine Zephyr]

\textrm{pwnz0rz}= \frac {-1337 \textrm{search engine}\pm \sqrt{(1337 \textrm{search engine})^2-4(1)(\textrm{gmail})}}{2}


Hmm, so you can mix words with numbers and pretty print in latex with \textrm.


...dont ask

 

[Davorak]

Testing
<br /> \begin{array}{ccccc}1&amp;2\\1&amp;2\\3&amp;2\\2&amp;4\\2&amp;5\\\end{array}<br />
<br /> \begin{array}{|c|c|c|c|c|}1&amp;2\\1&amp;2\\3&amp;2\\2&amp;4\\2&amp;5\\\end{array}<br />
<br /> \begin{array}{|c|c|c|c|c|}\hline1&amp;2\\\hline\hline1&amp;2\\\hline\hline3&amp;2\\\hline\<br /> \hline2&amp;4\\\hline\hline2&amp;5\\\hline\end{array}<br />

 

[Davorak]

bored and late

FBox[x_List] := StringJoin@ToString @@@ Flatten[
{
"\begin{array}\n",
"{", "|", Table["
c|", {n, 1, Length[x]}], "}", "\hline", Table[{Table[{ToString[x[[n1,
n2]]], If[n2 ≠ Dimensions[
x][[2]], "&", ""]}, {n2, 1, Dimensions[x][[2]]}], "\\\\", "\hline
"}, {n1, 1, Dimensions[x][[1]]}], "\n \end{array}"
}
]

FBox[{{1, 2}, {1, 2}, {3, 2}, {2, 4}, {2, 5}}]:
<br /> \begin{array}<br /> {|c|c|c|c|c|}\hline1&amp;2\\\hline1&amp;2\\\hline3&amp;2\\\hline2&amp;4\\\hline2&amp;5\\\hline<br /> \end{array}<br />

 

[Davorak]

F2[x_List] := StringJoin @@ ToString @@@ Flatten[
{
"\begin{array}",
"{", Table["c", {n, 1, Length[x]}], "}",
Table[
{Table[{ToString[x[[n1, n2]]], If[n2
≠ Dimensions[x][[2]], "&", ""]}, {n2, 1, Dimensions[x][[2]]}],
"\\\\"},
{n1, 1, Dimensions[x][[1]]}
],
"\end{array}"
}
]
F2[{{1, 2}, {1, 2}, {3, 2}, {2, 4}, {2, 5}}]:
<br /> \begin{array}{ccccc}1&amp;2\\1&amp;2\\3&amp;2\\2&amp;4\\2&amp;5\\\end{array}<br />

 

[Davorak]

The above code is for mathematica