A dichotomy theorem for mono-unary algebras

Su Gao
2000 Fundamenta Mathematicae  
We study the isomorphism relation of invariant Borel classes of countable mono-unary algebras and prove a strong dichotomy theorem.
doi:10.4064/fm-163-1-25-37 fatcat:v5tk5vie6zbl3brtk2nm66lnaq