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math.OA2022
Monadic forgetful functors and (non-)presentability for - and -algebras
Alexandru Chirvasitu, Joanna Ko
We prove that the forgetful functors from the categories of - and -algebras to Banach -algebras, Banach algebras or Banach spaces are all monadic, answering a question…
math.OA2021
The bicategory of groupoid correspondences
Celso Antunes, Joanna Ko, Ralf Meyer
We define a bicategory with étale, locally compact groupoids as objects and suitable correspondences, that is, spaces with two commuting actions as arrows; the 2-arrows are injecti…