category-theory

In the following diagram, it is not possible to drag Y on to the end of the arrow, despite it being empty.

In such a situation, it makes sense to allow Y to be dragged on top of the empty node.

I am on nixos and trying to use Graphviz and Tikz, however that is not straightforward.

It would be nice to have instructions about how to enable the two output formats. I guess it is because the dependencies are not wrapped as part of Julia, however it requires to find certain executables on the path.

Some information about how the process is officially intended would be helpful.

Complete algorithm: http://web.cecs.pdx.edu/~mpj/pubs/polyrec.html

We can already draw arbitrary permutations as sequences of swaps, but this can clutter diagrams unnecessarily.
An easy fix is to define Permutation boxes, with an appropriate refactoring of the drawing module.

These could then be constructed by calling diagram.permute as proposed in issue oxford-quantum-group/discopy#17.

One design decision that needs to be tak

• untabify
• indent
• align where needed