Browsing 2023 by MSC "18"
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Cauchy Completeness, Lax Epimorphisms and Effective Descent for Split Fibrations
[OWP-2023-06] (Mathematisches Forschungsinstitut Oberwolfach, 2023-06-19)For any suitable base category V, we find that V-fully faithful lax epimorphisms in V-Cat are precisely those V-functors F:A→B ... -
Lax Comma Categories of Ordered Sets
[OWP-2023-08] (Mathematisches Forschungsinstitut Oberwolfach, 2023-06-19)Let Ord be the category of (pre)ordered sets. Unlike Ord/X, whose behaviour is well-known, not much can be found in the literature about the lax comma 2-category Ord//X. In this paper ... -
Logical Relations for Partial Features and Automatic Differentiation Correctness
[OWP-2023-09] (Mathematisches Forschungsinstitut Oberwolfach, 2023-06-19)We present a simple technique for semantic, open logical relations arguments about languages with recursive types, which, as we show, follows from a principled foundation in categorical semantics. We demonstrate how it can ... -
Semantic Factorization and Descent
[OWP-2023-05] (Mathematisches Forschungsinstitut Oberwolfach, 2023-06-19)Let A be a 2-category with suitable opcomma objects and pushouts. We give a direct proof that, provided that the codensity monad of a morphism p exists and is preserved by a suitable morphism, the factorization ...