This tag is for questions regarding the display of fractions and related problems.

learn more… | top users | synonyms

44
votes
3answers
11k views

What is the difference between \over and \frac?

What is the difference between {some-expression}\over{another-expression} and \frac{some-expression}{another-expression} ? Which is preferable?
37
votes
2answers
959 views

Improved kerning in fractions?

Question How can I apply selective kerning within the numerator and denominator of an inline fraction? Specifically, I'd like to: Tighten kerning after the numerator if it ends in 7 Loosen kerning ...
30
votes
5answers
5k views

How do I typeset arbitrary fractions like the standard symbol for .5 = ½?

I know I've seen somewhere how to typeset 1/2 as ½, but with arbitrary fractions (that is, a macro that takes two arguments and makes the first denominator and the second numerator...). Now I can't ...
25
votes
1answer
13k views

How to get a little frac

I am wondering how to make a fraction in LaTeX small enough to fit on a line, or at least just a little larger. I could have sworn I had seen this before but I just cannot find it. In particular, I ...
19
votes
6answers
2k views

How to increase row height while using booktabs?

I'm making a table using booktabs. One of the columns contains a series of fractions. \documentclass[12pt, letterpaper]{article} \usepackage{nag} \usepackage[margin=1.0in]{geometry} ...
18
votes
5answers
611 views

Cross Multiplying Two Fractions with Ovals Around the Appropriate Terms

I would like to implement something akin to the following in LaTeX, perhaps in tikz. I would be very grateful for any help.
16
votes
3answers
1k views

Guidelines for typesetting fractions

I realize that this question is to some extent subjective. However, I suspect that there are some common standards regarding how fractions ought to be typeset in mathematics. The guide Mathematical ...
15
votes
3answers
587 views

How would you name these fraction macros?

I've got four macros now for typesetting fractions in text mode. The first writes them horizontally (shilling style, with a hyphen), the second writes them diagonally, the third writes them ...
15
votes
2answers
7k views

Smaller fractions in displayed formulae?

How do you make script-sized fractions in display mode? In certain cases, I find that \frac-based fractions are too large for my tastes in displayed formulae. For example, I feel that the fractions ...
14
votes
3answers
288 views

Frac or inference rule with dotted line

I would like to have a \frac or mathpartir-style inference rule with a dotted rather than solid line, so that I can put fractions into inference rules without overloading horizontal bar. The ...
14
votes
2answers
264 views

Aesthetic issue in fractions

While I was typing a document related to special relativity, I came across this slight misalignment in \frac{V}{c}(shown with huge text size so that the effect is easily seen) The 'problem' is that ...
14
votes
1answer
1k views

Reformat \frac depending on numerator/denominator size difference

Is it possible to detect cases where the second argument of \frac is much smaller than the first argument, and split it? Namely (I'm using a new macro name \wfrac to simplify things), \wfrac{x}{2} % ...
11
votes
5answers
1k views

How to typeset a continued fraction in the following format?

How does one typeset the following continued fraction as shown below? Source: Notes on continued fractions and recurrence sequences by Alfred van der Poorten. Note: Alf van der Poorten's style is ...
11
votes
3answers
226 views

\frac command: height of the numerator vs height of denominator

I have the following code: \begin{equation} \underline{W}^1_{\,q,\rho} = \left\lceil \frac{\sum\limits_{v \in Q, v \neq q}\underline{C}_{\,v} + \sum\limits_{i=\rho+1}^{|\Omega^{(U)}_q|}p_i+ ...
11
votes
4answers
3k views

How to print \frac{1}{2} by a single Unicode character?

I am looking for a command which would print simple fractions like 1/2, 1/3 etc using glyphs available in modern TTF/OTF fonts. Ideally, I want this command to output ordinary \frac{1}{2}, \frac{1}{3} ...
10
votes
1answer
2k views

Annotating individual math terms with braces

I am trying to annotate individual terms of a mathematical expression, as depicted below. The problem I get is that the comment seems to be taken as part of the fraction, which unnecessarily extends ...
9
votes
2answers
410 views

New command in TeX for fraction

Now I need to redefine the fractions as follows By writing \fr{2,3}, we get $\frac{2}{3}$. How can I achieve this? I have tried \newcommand{\fr}[1,2]{\frac{#1}{#2}} but got wrong.
9
votes
2answers
435 views

How do I typeset continued fractions in Pringsheim's concise notation?

I would like to obtain the following formatting so as to write continued fractions in my equations without wasting vertical space. What I need is one command named \cFrac which writes one fraction ...
9
votes
3answers
349 views

Nicer alignment of x^*/2

I'm trying to typeset $\frac{x^*}{2}$, but I can't find a (simple) way to make the alignment look nice. So far, I've tried the following: \documentclass{article} \begin{document} \begin{equation} ...
9
votes
4answers
748 views

Align denominator of fraction to left

The highlighted part has the equation centred, which looks rather imbalance with the top equation, is it possible to align the highlighted part to the left? Below is the code I am using. ...
9
votes
3answers
460 views

How can you change the width of a fraction bar?

I have an equation using fractions of fractions - much like \frac{\frac{a}{b}}{\frac{c}{d}} However, all of the fraction bars are the same width. I'd like to make the central bar wider than the ...
9
votes
2answers
192 views

Underbrace in denominator with () [] {} (howto)

I would like to put an underbrace correctly under the denominator of a expression but what I get is wrong because of the (). Alternatively I create another line in the text ...
9
votes
1answer
468 views

Automatically add fractions and reduce the result (if neccessary)

I'm trying to figure out how to reduce fractions. Adding fractions is no problem, see this example: \documentclass[parskip]{scrartcl} \usepackage[margin=15mm]{geometry} \usepackage{tikz} ...
9
votes
3answers
2k views

Legendre symbol in theory of numbers

How can I get a Legendre symbol , which just used the dashed line instead of the fractional rule?
9
votes
1answer
252 views

How to improve the looks of a fraction?

We may notice that the numerator and denominator in the following fraction are not aligned. And, to me it does not look good. How to align the numerator and denominator? \documentclass{article} ...
9
votes
1answer
4k views

displaystyle, dfrac, dcases

Am I correct in saying that the dcases environment replaces \frac with \dfrac? The replacement only occurs at the outer-most level of \frac, so if I have \documentclass{article} ...
9
votes
1answer
145 views

How and whether to fine-tune the vertical placement of a fraction line

This is a question about the aesthetics of mathematical typesetting, as well as a technical question about LaTeX. I'm writing a lot of expressions like this: (\log\frac{p_{i\to j}}{p_{j\to i}} in ...
9
votes
1answer
112 views

If fractions are Inner atoms, why don't they have thin spaces on either side?

The TeXbook says that fractions are Inner atoms. But if so, they don't seem to have thin spaces on either side when Inner atoms have them. For instance, in \documentclass{article} ...
8
votes
5answers
978 views

too little space between the bar on the denominator and the horizontal line

Please see below: There is too little space between the horizontal line from \frac and the bar from \bar{h_1}. So, it is a little hard to read. Any alternative way to represent the upper bar? And, ...
8
votes
4answers
2k views

Fraction with longer line

I'm trying to display some axioms and operational rules with LaTeX. Those are basically . They work quite well when used with frac, but it's not really nice, I'd like the fraction line to be a bit ...
8
votes
2answers
221 views

How to change horizontal alignment of \frac?

Typing \frac{W+W^*}{2} gives a fraction in which the denominator appears to the eye to be in the wrong position. Is there a way to correct this, i.e. place the 2 in under the + (without using ...
8
votes
5answers
6k views

How to properly subscript in a superscripted fraction?

the title says it all. It attached a MWE to display the different relative sizes of a subscript within a normal fraction and a superscripted fraction. As you can see, in the superscripted fraction the ...
8
votes
3answers
561 views

array within frac, using nath package

I use the nath package to get automatically-sized delimiters, but it breaks having a \begin{array}{…}…\end{array} within a \frac{}{} (simply removing the \usepackage{nath} below fixes the example, but ...
8
votes
1answer
192 views

How to eliminate the gaps before and after \frac{}{}?

The macro \frac add a gap (approx 1.2pt) before and after the whole fraction. You could compare \[\frac{1}{1}\frac{1}{1}\frac{1}{1}\frac{1}{1}\frac{1}{1}\frac{1}{1}\frac{1}{1}\frac{1}{1}\] and ...
8
votes
1answer
350 views

How to vertically center the fraction line?

I feel a bit weird because this is a really simple issue that apparently nobody has brought up so far but I find that very simple fractions produce output that looks vertically unbalanced. The ...
8
votes
3answers
184 views

How do I typeset a fraction of Young tableaux?

How do I typeset a fraction of Young tableaux so that the fraction is nicely spaced and diagonal? \documentclass{article} \usepackage{nicefrac} \usepackage{xfrac} \usepackage{youngtab} % for Young ...
8
votes
2answers
272 views

A special fraction macro with raised fraction bar

I need to create a macro which allows me to get a fraction with a raised fraction bar. In a first approach, I mean to create two boxes (numerator and denominator), separated by a fixed horizontal rule ...
7
votes
6answers
698 views

derivative with respect to a vector

\[ \frac{\partial f} {\partial \left( \begin{array}{l} x \\ y \\ z \end{array} \right) } \] gives Can you help me to improve this by reducing the size of the denominator?
7
votes
4answers
4k views

Proper display of fractions

Have a look at the following code: \documentclass[letterpaper]{article} \usepackage{amsmath,amssymb} \begin{document} $2-\frac{2}{1-\left(\frac{2}{2-\frac{2}{x^2}}\right)}$\quad ...
7
votes
2answers
264 views

How to stop fractions in display equations from running into each other?

Is there some standard way to create multiple display equations like the following without having to use: \renewcommand*{\arraystretch}{2} (so that the two rows in the second equation don't get ...
7
votes
2answers
222 views

Color fraction bar

What would be the easiest way to create a fraction whose bar can be coloured as desired? I know one can use the \genfrac{left-delim}{right-delim}{thickness}{mathstyle}{numerator}{denominator} command ...
7
votes
2answers
967 views

Please critique this “intermediate size” fraction macro.

I often write a lot of mathematics where I multiply various quantities/operators/etc. by fractions. The fractions are important for bookkeeping, but usually not the most important thing in the ...
6
votes
3answers
397 views

Define my own xfrac command?

Is it possible to create my own xfrac command - without using that package (it is giving me too much trouble)? I know you can do superscript, subscript to make a fraction look. Can I do something ...
6
votes
1answer
458 views

equal size numerator and denominator

I am trying to size the numerator and denominator of the below equation so that they are equal in size. I have not had much luck suggestions are appreciated. \begin{equation} \sum_{i=1}^{n} ...
6
votes
1answer
326 views

how to place text on fraction for accounting formulas?

Sorry for the bad grammar. English is not my native language. I want to have text on a fraction type line to show up in an accounting formula, here's an example of what I want: So, I've tried ...
6
votes
1answer
167 views

Can't make a fraction

I had been tried for a long time, but it had worked, I have this code, hope you can help me: \documentclass{article} \usepackage{amsmath} \begin{document} \begin{pmatrix} m\\ n \end{pmatrix} = ...
6
votes
3answers
586 views

Suggestions for splitting a large fractional equation?

I have seen a number of questions detailing specific means for how to break down a given equation, however I am more interested in the design at this point. That is, I'm not sure what part of this ...
6
votes
1answer
253 views

How to add quotation marks to fractions?

As the title says I want to add quotation marks around a fraction in \displaystyle mode. My first try looks very unnatural, as you can see ^{``}\frac{1}{0^-}^" The problem is with the first ...
6
votes
1answer
349 views

Nested exponents look too small

When I type $e^{\frac{\ln(r)}{2^{j}}}$, the output is: In the exponent, the denominator looks like 2j (especially in normal font), but it is supposed to look like 2^j. How can I make the term 2^j ...
6
votes
1answer
208 views

About shorthand \frac

It is possible to write \frac 2 4 or \frac \pi 4 to get 2/4 and \pi/4, respectively. However, it is not possible to write \frac \sqrt{2} 2 to get \sqrt{2}/2. Are there consistent rules on how to ...