I am writing a paper and I need to use the \not command on \sigma which stands for a order relation on a set. The issue is that the line over the sigma symbol is rendered poorly, is there any way I am not aware of so that the exact symbol I need is displayed correctly?

  • Please add a minimal working example (MWE) that illustrates your problem. You can draw it in detexify for both checking the symbol and also having a snapshot of what you wanted to post here.
    – percusse
    Nov 10, 2012 at 15:25
  • Crossing out a letter is IMHO a very ugly thing to do.
    – yo'
    Nov 10, 2012 at 15:30
  • @tohecz it's how my professor "named" the order relation, there isn't any I can do about it.
    – haunted85
    Nov 10, 2012 at 15:35
  • @percusse tried to edit the post, but the site throws me back a server error, but I'll keep in mind for next questions I might ask, thank you.
    – haunted85
    Nov 10, 2012 at 15:36
  • Related: The line produced by \not looks bad on wider symbols
    – Werner
    Nov 10, 2012 at 15:55

1 Answer 1


You can use centernot:

enter image description here

\usepackage{centernot}% http://ctan.org/pkg/centernot
$\not\sigma\ \centernot\sigma$

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.