Николай Иваныч (nivanych) wrote in category_theory,
Николай Иваныч
nivanych
category_theory

Corecursive Algebras, Corecursive Monads and Bloom Monads

Jiří Adámek, Mahdie Haddadi, Stefan Milius
Corecursive Algebras, Corecursive Monads and Bloom Monads

An algebra is called corecursive if from every coalgebra a unique coalgebra-to-algebra homomorphism exists into it.
We prove that free corecursive algebras are obtained as coproducts of the terminal coalgebra (considered as an algebra) and free algebras.
The monad of free corecursive algebras is proved to be the free corecursive monad, where the concept of corecursive monad is a generalization of Elgot's iterative monads, analogous to corecursive algebras generalizing completely iterative algebras.
We also characterize the Eilenberg-Moore algebras for the free corecursive monad and call them Bloom algebras.
http://arxiv.org/abs/1407.4425
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