Derivatives of Containers

نویسندگان

  • Michael Gordon Abbott
  • Thorsten Altenkirch
  • Neil Ghani
  • Conor McBride
چکیده

We are investigating McBride’s idea that the type of one-hole contexts are the formal derivative of a functor from a categorical perspective. Exploiting our recent work on containers we are able to characterise derivatives by a universal property and show that the laws of calculus including a rule for initial algebras as presented by McBride hold — hence the differentiable containers include those generated by polynomials and least fixpoints. Finally, we discuss abstract containers (i.e. quotients of containers) — this includes a container which plays the role of ex in calculus by being its own derivative.

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تاریخ انتشار 2003