TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

The Eulerian polynomials of the second kind are defined as (see for example here)

E_n(x) = \sum_{m\ge0} \left\langle\!\!\left\langle n\atop  m\right\rangle\!\!\right\rangle  x^m .

I would like to use \genfrac to display this formula (similar as \genfrac is used to display the Eulerian numbers). Is this possible?

share|improve this question
Please show us, what you have tried and what your result should look like (screen-shot). What is the problem with the \genfrac command from egregs answer here? – LaRiFaRi Jun 9 '15 at 14:44

The following example takes the double brackets from package MnSymbol and uses \genfrac. An alternative would be a simple matrix environment.


      <-6>  MnSymbolE5
     <6-7>  MnSymbolE6
     <7-8>  MnSymbolE7
     <8-9>  MnSymbolE8
     <9-10> MnSymbolE9
    <10-12> MnSymbolE10
    <12->   MnSymbolE12}{}
      <-6>  MnSymbolE-Bold5
     <6-7>  MnSymbolE-Bold6
     <7-8>  MnSymbolE-Bold7
     <8-9>  MnSymbolE-Bold8
     <9-10> MnSymbolE-Bold9
    <10-12> MnSymbolE-Bold10
    <12->   MnSymbolE-Bold12}{}


  E_n(x) = \sum_{m\ge0} \Eulerian{n}{m} x^m


share|improve this answer

This solution uses \genfrac although not exclusively; however it does avoid \atop and works with MathJax.

\sum_{m\ge0}\left\langle\!\!\!\genfrac<>{0pt}{}{n}{m}\!\!\!\right\rangle x^{m} 
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

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