Strong and full dualisability: three-element unary algebras
Jane G. Pitkethly · Journal of the Australian Mathematical Society · 2002
Abstract We characterise the strongly dualisable three-element unary algebras and show that every fully dualisable three-element unary algebra is strongly dualisable. It follows from the characterisation that, for dualisable three-element unary algebras, strong dualisability is equivalent to a weak form of injectivity.