An equational notion of lifting monad

Anna Bucalo, Carsten Fuhrmann, Alex Simpson

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We introduce the notion of an equational lifting monad: a commutative strong monad satisfying one additional equation (valid for monads arising from partial map classifiers). We prove that any equational lifting monad has a representation by a partial map classifier such that the Kleisli category of the former fully embeds in the partial category of the latter. Thus, equational lifting monads precisely capture the equational properties of partial maps as induced by partial map classifiers. The representation theorem also provides a tool for transferring non-equational properties of partial map classifiers to equational lifting monads. It is proved using a direct axiomatization of Kleisli categories of equational lifting monads. This axiomatization is of interest in its own right.
Original languageEnglish
Pages (from-to)31 - 60
Number of pages30
JournalTheoretical Computer Science
Issue number1?2
Publication statusPublished - 2003

Keywords / Materials (for Non-textual outputs)

  • Premonoidal categories


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