0

I want to draw a two-cell diagram using xypic, the problem is that the bigone label is to long, how can I make the following diagram:

enter image description here

looks like this one:

enter image description here

using exclusively the two-cell feature of xypic, or at least, keep the \uppertwocell and \lowertwocell commands and draw a {=>} arrow using -| feature.

Here is the code:

\xymatrix{\star &  & \star\lltwocell_{g{}_{1}g{}_{2}}^{g''_{1}g''_{2}}<7>{^{(\alpha'\circ\beta')\bullet(\alpha\circ\beta)}}}

Knowing that the second diagram was drawn using \ar commands, but in LyX environment, which prevent from scrolling horizontally the window, using only \ar commands is not very comfortable!

  • 1
    Just so you know: horizontal scrolling is coming. Not in LyX 2.1, but probably 2.2. – scottkosty Oct 4 '13 at 19:58
  • Very good news! I hope it will not be after I finished my thesis :-D – ubugnu Oct 4 '13 at 20:08
2

One approach with tikz-cd:

\documentclass{standalone}
\usepackage{tikz-cd}

\begin{document}
\begin{tikzcd}
\star 
  \arrow[from=rr,bend right,"g_1 g_2"{above,name=U}] 
  \arrow[from=rr,bend left,"g_1'' g_2''"{below,name=D}] & 
(\alpha' \circ \beta') \bullet (\alpha \circ \beta) 
  \arrow[equal,from=U,shorten <=0.3333em] % 0.3333em from default inner sep value
  \arrow[Rightarrow,to=D,shorten >=0.3333em] & 
\star
\end{tikzcd}
\end{document}

enter image description here

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.