Slashed fraction instead of vertical one

[TheBigBadBen]

Is there any way to nicely LaTeX a "slashed" fraction? In other words, if I want to write $a_1/a_2$ instead of $\frac{a_1}{a_2}$ or even $\dfrac{a_1}{a_2}$, is there a way to make it look nice?

 

[I like Serena]

You mean like $$^{a_1}\!\!/\!_{a_2}$$?

It turns out that in real $\LaTeX$, you can use

\documentclass{article}
\usepackage{units}
\begin{document}

$\nicefrac{a_1}{a_2}$

\end{document}

which looks like:

View attachment 871​

 

[TheBigBadBen]

I found this, which seems to be working a little better

LaTeX force slash fraction notation - Stack Overflow

A sample result:

View attachment 872

What I like about this is that you get a nice fraction without changing the font size or extending the line.

I was also trying to find something that would work on MHB, if anything like that exists.

 

[I like Serena]

What works on MHB is ^{a_1}/_{a_2}.
See my previous post for how it looks (slightly adjusted with negative space \!).

 

[Evgeny.Makarov]

Is there any way to nicely LaTeX a "slashed" fraction? In other words, if I want to write $a_1/a_2$ instead of $\frac{a_1}{a_2}$ or even $\dfrac{a_1}{a_2}$, is there a way to make it look nice?

What exactly is ugly about $a_1/a_2$, i.e., what do you want to change? The nicefrac package makes the numerator and denominator smaller and moves them closer to the slash; that's what is calls "nice" as opposed to fractions with regular slash, which it calls "ugly". This is debatable. The StackOverflow method simply makes the height of the slash equal to the height of its arguments.

And how is $a_1/a_2$ different from the following example?

A sample result:

View attachment 872

The TeXbook does not recommend any special care with slash in fractions. There is a subtlety, though:

"TEX does not treat $/$ as a binary operation, even though a slash stands for division (which qualifies as a binary operation on mathematical grounds). The reason is that printers traditionally put extra space around the symbols $+$, $−$, and $*$, but not around $/$. If TEX were to typeset $/$ as a binary operation, the formula ‘\$1/2\$’ would come out ‘$1\mathbin{/}2$’, which is wrong; so TEX considers $/$ to be an ordinary symbol."

Another advice from the TeXbook is not to overuse \frac (or, rather, \over in plain TeX). E.g., instead of $\dfrac{\frac{a}{b}}{2}$ it is recommended to type $\dfrac{a/b}{2}$.

 

[Opalg]

Another advice from the TeXbook is not to overuse \frac (or, rather, \over in plain TeX). E.g., instead of $\dfrac{\frac{a}{b}}{2}$ it is recommended to type $\dfrac{a/b}{2}$.

That applies especially in exponents. I always write $x^{1/2}$ in preference to $x^{\frac12}$, also $$\int_{-\pi/2}^{\pi/2}f(t)\,dt$$ rather than $$\int_{-\frac\pi2}^{\frac\pi2}f(t)\,dt$$.

 

[TheBigBadBen]

What exactly is ugly about $a_1/a_2$, i.e., what do you want to change? The nicefrac package makes the numerator and denominator smaller and moves them closer to the slash; that's what is calls "nice" as opposed to fractions with regular slash, which it calls "ugly". This is debatable. The StackOverflow method simply makes the height of the slash equal to the height of its arguments.

What annoys me is that the size of the slash doesn't adjust to the size of the numerator and denominator. To me, ${a_1}^2/{B_1^2}$ does not look pretty. I think the StackOverflow method captures my aesthetics.

I think I like Serena's approach is probably what I'll use here.

 

[Dustinsfl]

If you are really worried about the aesthetics, you could always do something like this:

\newcommand{\name}{% name is whatever you want to call it   
   \leavevmode   
   \begingroup   
   \setbox 2 = \hbox {\small \(a_1\)}%   
   \setbox 0 = \hbox {/}%   
   \dimen 0 = \ht 0  \advance \dimen 0 by -\ht 2   
   \raise \dimen 0 \box 2   
   \kern -0.3333\wd0/\kern -0.3333\wd 0   
   \lower \dp 0 \hbox {\small \(a_2\)}%   
   \endgroup 
}
\begin{document}
something \name\space something
\end{document}

 

[I like Serena]

Here's an overview, using MiKTeX.

http://www.mathhelpboards.com/attachment.php?attachmentid=875

 

[TheBigBadBen]

Here's an overview, using MiKTeX.

http://www.mathhelpboards.com/attachment.php?attachmentid=875

I can't view your attachment

 

[I like Serena]

I can't view your attachment

Huh?
What do you see?
As far as I can tell, you quoted the picture I uploaded.
That is, in your quote the picture shows normally.

 

[I like Serena]

Anyway, here's the overview as far as it renders here.

\(

\newcommand{\slfrac}[2] { \left.#1\middle/#2\right. }

\verb|\newcommand{\ILS}[2] { ^{#1}\!\!/\!_{#2} }| \\
\newcommand{\ILS}[2] { ^{#1}\!\!/\!_{#2} }
\verb|\newcommand{\dILS}[2] { ^{ \displaystyle #1}\!\!/\!_{ \displaystyle #2} }| \\
\newcommand{\dILS}[2] { ^{ \displaystyle #1}\!\!/\!_{ \displaystyle #2} }
\verb|\newcommand{\xILS}[2] { \left. ^{ \displaystyle #1}\!\!\middle/\!_{ \displaystyle #2} \right. }| \\
\newcommand{\xILS}[2] { \left. ^{ \displaystyle #1}\!\!\middle/\!_{ \displaystyle #2} \right. }

\begin{array}{|l|ccc|}
\hline \\
\verb|\frac{#1}{#2}| & \frac{1}{2} & \frac{a_1}{a_2} & \frac{a_1^2}{B_1^2} \\ \\
\verb|\dfrac{#1}{#2}| & \dfrac{1}{2} & \dfrac{a_1}{a_2} & \dfrac{a_1^2}{B_1^2} \\ \\
\verb|#1/#2| & 1/2 & a_1/a_2 & a_1^2/B_1^2 \\ \\
\verb|\left.#1\middle/#2\right.| & \slfrac{1}{2} & \slfrac{a_1}{a_2} & \slfrac{a_1^2}{B_1^2}\\ \\
\verb|\ILS{#1}{#2}| & \ILS{1}{2} & \ILS{a_1}{a_2} & \ILS{a_1^2}{B_1^2}\\ \\
\verb|\dILS{#1}{#2}| & \dILS{1}{2} & \dILS{a_1}{a_2} & \dILS{a_1^2}{B_1^2}\\
\verb|\xILS{#1}{#2}| & \xILS{1}{2} & \xILS{a_1}{a_2} & \xILS{a_1^2}{B_1^2}\\
\hline
\end{array}

\)

 

[I like Serena]

Let me retry the attachment.
I was fiddling with it before to get it to show neatly.

http://www.mathhelpboards.com/attachment.php?attachmentid=877&d=1370685379

 

[TheBigBadBen]

So before, the attachment just showed up as a "couldn't load image" error at that spot before. Not sure what happened there. At any rate, I can see your latest post just fine. Thank you for the table! I stand by my aesthetic opinion here, so \middle/ seems to work best for me. I think that's what I'm going to be using from now on, if it comes up; I think it will look better for nested fractions too.