Namely, how come Kleisly category for Maybe over Haskell is not very good category, thought about cardinality, negative and complex. Turned out these issues are already covered.
negativecomplexthis, toooh, whatever
What I was trying to figure out, is it true that
Set is actually a regular exponential, and its derivative is
Set itself? Probably so.
See, I was enticed by the idea of doing derivatives of algebraic types, and how to expand it to other functors. Seems like
Set is doable. It is exp().
Now let's do some trigonometry, eh. And some Fourier transforms over databases (and the internets). If you know what I mean.