just testing

**Neodymium** · February 17th 2010, 08:12 PM

Test

$\int^\frac{\pi}{4} _0 \cos(4x)$

**Drexel28** · February 19th 2010, 07:00 PM

$\underset{\smile}{\text{. .}}$

**Opalg** · February 20th 2010, 08:39 AM

Originally Posted by Drexel28

$\underset{\smile}{\text{. .}}$

. . . . . . . . . . $\setbox0=\hbox{$\text{o o} \atop\displaystyle \smile$}\dimen0=\wd0 \divide\dimen0 by 2 \advance\dimen0 by -12pt \lower2pt\hbox to0pt{\kern\dimen0\Huge$\bigcirc$\hss}\box0$

(A few years ago, I had to develop a macro for putting a circle round an expression, when I was teaching a course on games theory. The solutions sheets for the homework exercises had to include things like $\begin{bmatrix}1&\framebox[1.25em]{$-1$}&\setbox0=\hbox{$-3$}\dimen0=\wd0 \divide\dimen0 by 2 \advance\dimen0 by -8.5pt \lower0.6pt\hbox to0pt{\kern\dimen0\Large$\bigcirc$\hss}\box0\,\\ \,\fbox{2}&\setbox0=\hbox{$-2$}\dimen0=\wd0 \divide\dimen0 by 2 \advance\dimen0 by -8.5pt \lower0.6pt\hbox to0pt{\kern\dimen0\Large$\bigcirc$\hss}\box0&\fbox {3}\end{bmatrix}$ .)

**Moo** · February 20th 2010, 08:46 AM

Haha the last 2 are nice ones !

Hmmm $\textcircled{L}\textcircled{e}\textcircled{t}\text circled{t}\textcircled{e}\textcircled{r} ~ \textcircled{b}\textcircled{y} ~\textcircled{l}\textcircled{e}\textcircled{t}\tex tcircled{t}\textcircled{e}\textcircled{r}$

**Opalg** · February 20th 2010, 11:35 AM

Originally Posted by Moo

Haha the last 2 are nice ones !

Hmmm $\textcircled{L}\textcircled{e}\textcircled{t}\text circled{t}\textcircled{e}\textcircled{r} ~ \textcircled{b}\textcircled{y} ~\textcircled{l}\textcircled{e}\textcircled{t}\tex tcircled{t}\textcircled{e}\textcircled{r}$

If I had known about the \textcircled command, it would have saved me a lot of work!

(I don't believe it featured in earlier versions of LaTeX.)

**thapchi** · March 1st 2010, 08:05 AM

just testing

$ \frac{\sin} {\cos} = \tan $

**integral** · April 8th 2010, 04:22 PM

$\overset{\begin{array} {c} \color{red} \blacktriangle \end{array}}\sum^{\frac{dx}{dy}x^3}_{love}$ $\frac{\left [ \left ( -1 \right ) x^{2n+1} \right ]}{\left ( 2n+1 \right )!}$

It is my summation of love...

**Bacterius** · April 9th 2010, 04:03 AM

$\prod_{n = 0}^{+\infty} \frac{\varphi{(n)}}{\ln{(n)}} + \epsilon$

Just messing around ...

**Drexel28** · April 20th 2010, 07:16 PM

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow ^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

**Opalg** · April 20th 2010, 11:54 PM

Originally Posted by Drexel28

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow ^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

Nice! The only improvement I can suggest is a little tweak to lower the $\pi$ beside the right-hand vertical arrow:

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow {}^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

**Bacterius** · April 21st 2010, 12:00 AM

Originally Posted by Drexel28

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow ^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

Interesting diagram, although the horizontal lines look a bit jagged and blurred on my computer, anyone got the same artifact ?

**Drexel28** · April 21st 2010, 03:22 PM

Originally Posted by Opalg

Nice! The only improvement I can suggest is a little tweak to lower the $\pi$ beside the right-hand vertical arrow:

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow {}^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

Yeah, I meant to lower it. Thanks for the tip!

Do you have any idea how to do triangular diagrams with this? I can't figure out how to make it nice. One of my main problems is that [tex]\bigg\searrow[/tex] produces $\bigg\searrow$

Originally Posted by Bacterius

Interesting diagram, although the horizontal lines look a bit jagged and blurred on my computer, anyone got the same artifact ?

Yeah, I'm not sure

**Drexel28** · April 30th 2010, 08:44 PM

$\varphi(x)=\prod_{z\in\mathbb{C}}(x-z)\overset{?}{=}0$

**Opalg** · May 1st 2010, 12:01 AM

Originally Posted by Drexel28

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ ^{\pi\times\pi}\bigg\downarrow & & \bigg\downarrow ^{\pi} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

Looking at this again, I can see another way in which it needs tweaking. Ideally, the vertical arrow on the left should be aligned with the product signs above and below it; and the vertical arrow on the right should similarly be aligned under the $\Omega$ above it. You can achieve that quite easily by using the \llap and \rlap commands. These produce boxes of zero width whose contents overlap to the left or right respectively.

$\begin{matrix}\Omega\times\Omega & \xrightarrow[\quad\quad\quad]{\alpha} & \Omega\\ \llap{$\scriptstyle\pi\times\pi$}\bigg\downarrow & & \bigg\downarrow\rlap{$\scriptstyle\pi$} \\ \text{Top }\Omega\times\text{Top }\Omega & \xrightarrow[\quad\quad\quad]{\overset{\sim}{\alpha}} & \text{Top }\Omega\end{matrix}$

Originally Posted by Bacterius

Interesting diagram, although the horizontal lines look a bit jagged and blurred on my computer, anyone got the same artifact ?

Yes, that is an artefact caused by the fact that TeX does not have ready-made glyphs for long horizontal arrows. Instead, it constructs them on the fly by joining a sequence of short dashes to an arrowhead. The effect on the screen looks a bit uneven, though the printed version would probably be smoother.

**Focus** · May 1st 2010, 01:04 AM

Originally Posted by Drexel28

$\varphi(x)=\prod_{z\in\mathbb{C}}(x-z)\overset{?}{=}0$

Overset huh? Been looking for that a while now. Thanks.

Thread: just testing

LinkBack

Thread Tools

Display

Similar Math Help Forum Discussions

Testing

Testing

Hp testing

Testing two variances is the same as testing two means?

testing..

Search Tags