Apomorphism

In formal methods of computer science, an apomorphism (from ἀπό — Greek for "apart") is the categorical dual of a paramorphism and an extension of the concept of anamorphism (coinduction). Whereas a paramorphism models primitive recursion over an inductive data type, an apomorphism models primitive corecursion over a coinductive data type.

Origins

The term "apomorphism" was introduced in Functional Programming with Apomorphisms (Corecursion).^[1]

See also

• Morphism
• Morphisms of F-algebras
  • From an initial algebra to an algebra: Catamorphism
  • From a coalgebra to a final coalgebra: Anamorphism
  • An anamorphism followed by an catamorphism: Hylomorphism
  • Extension of the idea of catamorphisms: Paramorphism