11

I'm trying to reproduce the way the Kampé de Fériet function is typeset in a paper. Here's a screenshot: enter image description here

Here's what I've got:

\documentclass{article}

\usepackage{amstext, amsmath, amssymb}

\makeatletter
\newcommand{\longdash}[1][2em]{%
  \makebox[#1]{$\m@th\smash-\mkern-7mu\cleaders\hbox{$\mkern-2mu\smash-\mkern-2mu$}\hfill\mkern-7mu\smash-$}}
\makeatother
\newcommand{\omitskip}{\kern-\arraycolsep}
\newcommand{\llongdash}[1][2em]{\longdash[#1]\omitskip}
\newcommand{\rlongdash}[1][2em]{\omitskip\longdash[#1]}


\begin{document}

\begin{equation}
F_{2:0:0}^{0:2:1}\left[{\llongdash :\dfrac{a+b+1}{2},\dfrac{a-b+1}{2};1\atop \dfrac{a+b+3}{2},\dfrac{a-b+3}{2}:\llongdash;\rlongdash}\Bigg\vert x\dfrac{y^2}{4},\dfrac{y^2}{4}\right]
\end{equation}

\end{document}

which produces this: enter image description here

It's close but not quite. The subscript and subperscript appear to be slightly shifted horizontally. Worse yet, the parameters (or arguments of the function) appear to be misaligned as well. Any advise?

The long dashes were borrowed from here.

2
  • For your first problem a thinspace (\,) can do the job. For the next problems I would suggest an array (Search for this)
    – koleygr
    Feb 26, 2018 at 21:23
  • 1
    About the superscripts and subscripts, you can add a italic correction (\/) after the F: F\/_{2:0:0}^{0:2:1} Feb 26, 2018 at 21:24

2 Answers 2

12

You can use an array. You get staggered subscript and superscript by setting them to an empty subformula.

\documentclass{article}

\usepackage{amsmath}

\newcommand{\linefill}{% a variation on \rightarrowfill
  {-}\mkern-7mu
  \cleaders\hbox{$\mkern-2mu-\mkern-2mu$}\hfill
  \mkern-7mu{-}%
}

\begin{document}

\begin{equation}
F{}_{2:0:0}^{0:2:1}
  \left[
   \setlength{\arraycolsep}{0pt}% local assignment
   \begin{array}{c@{{}:{}}c@{;{}}c}
   \linefill & \dfrac{a+b+1}{2},\dfrac{a-b+1}{2} & \quad 1 \\[1ex]
   \dfrac{a+b+3}{2},\dfrac{a-b+3}{2} & \qquad\linefill & \linefill
   \end{array}
   \;\middle|\;
   x\dfrac{y^2}{4},\dfrac{y^2}{4}
 \right]
\end{equation}

\end{document}

enter image description here

11

Mixed use of arrays, \dfracs and \phantoms:

enter image description here

\documentclass{article}

\usepackage{amsmath}

\begin{document}

\[
  F \mathstrut_{2:0;0}^{0:2;1}
    \left[
      \begin{array}{@{} c @{:} c @{;} c @{;}}
        \dfrac{\phantom{\mu + \nu + 3, \mu - \nu + 3}}{\phantom{2}} & 
          \dfrac{\mu + \nu + 1}{2}, \dfrac{\mu - \nu + 1}{2} &
          1 \\
        \dfrac{\mu + \nu + 3}{2}, \dfrac{\mu - \nu + 3}{2} &
          \dfrac{\phantom{\mu + \nu + 1, \mu - \nu + 1}}{\phantom{2}} &
          \dfrac{\phantom{0}}{\phantom{0}}
      \end{array}
      a \dfrac{z^2}{4}, \dfrac{z^2}{4}
    \right]
\]

\end{document}

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .