I tried to do this, but I could not get it, any suggestions on how to make the arrows in the middle?

enter image description here

I try this

C \arrow[bend left]{r}{F}
\arrow[bend right]{r}{H}
& D

The manual of tikz-cd has this help, but i couldnt get the arrows on the center. enter image description here

  • 2
    Welcome to TeX.SX. It would be very helpful, if you could provide the code what you have reached so far. This makes it much easier for us (the helpers). – Stefan Pinnow Jul 18 '17 at 17:29

Hope this gets you started.

I don't have any kind of expertise with tikz-cd, actually first time I tried it.

The output

enter image description here

The output

\usepackage{mathrsfs} % for the mathscr
    \arrow[r, bend left=50, ""{below=-3pt,name=U}, "\mathcal{F}"{very near end, inner sep=1pt}]
    \arrow[r, ,"\mathcal{G}"{very near start, inner sep=1pt}, "" {below=-3pt,name=M}]
    \arrow[r, bend right=50, ""{below=-3pt,name=D}, "\mathcal{H}"{very near end,below}]
      & \mathscr{D}
  % the downwards arrows
    \arrow[Rightarrow, from=U, to=M, "\alpha"]
    \arrow[Rightarrow, from=M, to=D, "\beta"]
  • This is a direct adaptation of the tikz-cd manual example posted by OP. – marsupilam Jul 18 '17 at 19:00

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