Symbolic Differentiation

[rockt]

• Extend Differentiator
• Implement Simplifier (could be useful for other stuff as well)

Java libraries

• JAutoDiff
• Apache Commons Math
  • Not symbolic!
• Deriva
  • Symbolic, but only in the clojure implementation
  • In Java, I can't get a symbolic representation of the derivative
• Jap

[rockt]

Deferred, since I couldn't find a satisfying solution and writing our own symbolic differentiation would be quite time consuming. We can use Deriva to replace the AST of a mathematical expression (annotated with @Differentiable) with a function (Apply) that, when called, calculates the derivative. However, I don't think we get access to the symbolic representation of the derivative. Also, Deriva seems to be quite alpha. Alternatives are building upon other non-Java libraries for symbolic differentiation.

Reopen, since we can generate NumPy code from within Scala and call it :D