Fcc -> Fcc. Donno if it has a right adjoint,
Hacked a little cheesy pTk thingy which slides
around pixels in a way derived from the `triangle
paradox' thingy. Sort of cute.
Trying to understand in general what kind of diagrammatic interactions between degree-three nodes actually read sensibly in the lambda calculus:
Not sure this is the simplest possible inverse (or even that it is correct) but it makes for a fun diagram: