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Adjoint functor theorems for lax-idempotent pseudomonads
Stockholm University, Faculty of Science, Department of Mathematics.ORCID iD: 0000-0003-1787-4858
Number of Authors: 32024 (English)In: Theory and Applications of Categories, ISSN 1201-561X, Vol. 41, no 20, p. 667-685Article in journal (Refereed) Published
Abstract [en]

For each pair of lax-idempotent pseudomonads R and I, for which I is locally fully faithful and R distributes over I, we establish an adjoint functor theorem, relating R-cocontinuity to adjointness relative to I. This provides a new perspective on the nature of adjoint functor theorems, which may be seen as methods to decompose adjointness into cocontinuity and relative adjointness. As special cases, we recover variants of the adjoint functor theorem of Freyd, the multiadjoint functor theorem of Diers, and the pluriadjoint functor theorem of Solian-Viswanathan, as well as the adjoint functor theorems for locally presentable categories. More generally, we recover enriched Φ-adjoint functor theorems for weakly sound classes of weight Φ.

Place, publisher, year, edition, pages
2024. Vol. 41, no 20, p. 667-685
Keywords [en]
adjoint functor theorem, relative adjunction, lax-idempotent pseudomonad, KZ-doctrine, free cocompletion, pseudodistributive law, 2-category, formal category theory
National Category
Algebra and Logic
Identifiers
URN: urn:nbn:se:su:diva-231588ISI: 001243753800001Scopus ID: 2-s2.0-85196756693OAI: oai:DiVA.org:su-231588DiVA, id: diva2:1887502
Available from: 2024-08-08 Created: 2024-08-08 Last updated: 2024-08-08Bibliographically approved

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Di Liberti, Ivan

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