I have a simple question, I would like to make the font-size of the numerator the same as that of my denominator. For example, something like this:

e^{-j \frac{2 \pi n k}{K_F}} 

gives me an ugly looking equation..., where the $K_F$ looks way bigger than the stuff on the top.

Is there a way to make the top and bottom look 'nicer' together?


  • 1
    I would prefer 2\pi n k/K_F. – Andrew Swann May 19 '14 at 17:16
  • 1
    The size is the same, but the denominator has capital letters, which are bigger. – egreg May 19 '14 at 17:19
  • 2
    For such large superscripts it is recommended to use \exp instead: $\exp (-j \frac{2 \pi n k}{K_F} ) $ or $\exp (-2 \pi n j k /K_F ) $. – Gonzalo Medina May 19 '14 at 17:19
  • @GonzaloMedina Hmm, I suppose those can work, but I would really like to use the $e$ and not exp. Is there a way to simply make the denom smaller? – Spacey May 19 '14 at 17:32
  • You could use a scaling factor (but I will not recommend this): $ e^{-j \frac{2 \pi n k}{\smash{\scalebox{.5}{$K_{F}$}}}} $ (requires to load graphicx). – Gonzalo Medina May 19 '14 at 18:23

You can obtain something that more or less looks like what you want.

First method: in the denominator you pass in text mode, choose a smaller font size and return to math mode. I give two examples, with \small and footnotesize.

Second method: you use a font that has slanted small caps, like Latin Modern or MinonPro. You declare a new math alphabet to use them in math mode. I give an example with the cfr-lm package, where slanted smallcaps are called sishape.

    \documentclass[12pt, a4paper]{article}


    \usepackage{mathtools, nccmath, textcomp, relsize}



    \[ e^{-j \frac{2 π n k}{K_{\!F}}} \]%

    \[ e^{-j \frac{2 π n k}{\text{\small$ \scriptscriptstyle K_{\!F}$}}} \]%

    \[ e^{-j \frac{2 π n k}{\text{\footnotesize$ \scriptscriptstyle K_{\!F }$}}} \]%

    \[ e^{-j \frac{2 π n k}{\mathsi{k_f}}} \]%



| improve this answer | |
  • Sorry: I don't understand what's happening. I loaded a .png of the result and it doesn't display. – Bernard May 19 '14 at 20:01
  • Look at your browser tab it's not loading the page. Imgur is down – percusse May 19 '14 at 20:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.