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The aim of this paper is to present a very simple original, purely formal, proof of Quillen's adjunction theorem for derived functors, and of some more recent variations and generalizations of this theorem. This is obtained by proving an…

Algebraic Topology · Mathematics 2007-05-23 Georges Maltsiniotis

We extend the basic concepts of Street's formal theory of monads from the setting of 2-categories to that of double categories. In particular, we introduce the double category Mnd(C) of monads in a double category C and define what it means…

Category Theory · Mathematics 2014-07-15 Thomas M. Fiore , Nicola Gambino , Joachim Kock

We discuss the general theory of realizing two-variable fuctions on slide rules (based on our paper 1977) and offer some new scales for practical use.

History and Overview · Mathematics 2017-06-13 István Szalkai

We introduce, comment and develop the Scott adjunction, mostly from the point of view of a category theorist. Besides its technical and conceptual aspects, in a nutshell we provide a categorification of the Scott topology over a posets with…

Category Theory · Mathematics 2022-01-27 Ivan Di Liberti

This article tackles categorical coherence within a two-dimensional generalization of Lawvere's functorial semantics. 2-theories, a syntactical way of describing categories with structure, are presented. From the perspective here afforded,…

Category Theory · Mathematics 2007-05-23 Noson S. Yanofsky

The additivity theorem for derivateurs associated to complicial biWaldhausen categories is proved. Also, to any exact category in the sense of Quillen a K-theory space is associated. This K-theory is shown to satisfy the additivity,…

K-Theory and Homology · Mathematics 2007-05-23 Grigory Garkusha

We give a simple proof of a crucial lemma that is established in [1, Lemma 2.1] by induction, and plays important roles in that paper and [2].

Functional Analysis · Mathematics 2018-07-12 Shibo Liu

We prove that a Quillen adjunction of model categories (of which we do not require functorial factorizations and of which we only require finite bicompleteness) induces a canonical adjunction of underlying quasicategories.

Category Theory · Mathematics 2015-01-14 Aaron Mazel-Gee

We establish a general uniqueness theorem for subharmonic functions of several variables on a domain. A corollary from this uniqueness theorem for holomorphic functions is formulated in terms of the zero subset of holomorphic functions and…

Complex Variables · Mathematics 2016-06-14 Bulat Khabibullin , Nargiza Tamindarova

If $\mathcal{C}$ is a cocomplete monoidal category in which tensoring from both sides preserves coequalizers, then the category of monoids over $\mathcal{C}$ is cocomplete. The same holds if $\mathcal{C}$ has regular factorizations and…

Category Theory · Mathematics 2018-07-03 Hans-E. Porst

We prove a derived category version of the Sebastiani-Thom Theorem, which describes the vanishing cycles of the sum of two functions of disjoint variables.

Algebraic Geometry · Mathematics 2007-05-23 David B. Massey

By the biadjoint triangle theorem, given a pseudomonad $\mathcal{T} $ on a $2$-category $\mathfrak{B} $, if a right biadjoint $\mathfrak{A}\to\mathfrak{B} $ has a lifting to the pseudoalgebras…

Category Theory · Mathematics 2019-02-05 Fernando Lucatelli Nunes

This paper introduces the notion of a categorical pair, a pair of categories (C,C') such that every morphism in C is an object in C'. Categorical pairs are precursors to 2-categories. Arrows in C' can express relationships among the…

Category Theory · Mathematics 2011-12-12 Louis H. Kauffman

We present a theorem about irreducibility of a polynomial that is the resultant of two others polynomials. The proof of this fact is based on the field theory. We also consider the converse theorem and some examples.

Commutative Algebra · Mathematics 2018-01-18 Beata Hejmej

We present a version of arithmetic in all finite types which allows for a definition of equality at higher types for which all congruence are derivable, for which the soundness of the Dialectica interpretation is provable inside the system…

Logic · Mathematics 2016-09-21 Benno van den Berg

This second part comes to the construction of the spectrum associated to a situation of multi-adjunction. Exploiting a geometric understanding of its multi-versal property, the spectrum of an object is obtained as the spaces of local units…

Category Theory · Mathematics 2021-04-07 Axel Osmond

The theory of associative $n$-categories has recently been proposed as a strictly associative and unital approach to higher category theory. As a foundation for a proof assistant, this is potentially attractive, since it has the potential…

Logic in Computer Science · Computer Science 2022-05-19 Lukas Heidemann , David Reutter , Jamie Vicary

We study the meaning of "adding a constant to a language" for any doctrine, and "adding an axiom to a theory" for a primary doctrine, by showing how these are actually two instances of the same construction. We prove their universal…

Category Theory · Mathematics 2024-10-22 Francesca Guffanti

We define a notion of "theory of (1,infty)-categories", and we prove that such a theory is unique up to equivalence.

Category Theory · Mathematics 2007-05-23 B. Toen

We study the asymptotic behaviour of convolution-type functionals defined on general periodic domains by proving an extension theorem

Analysis of PDEs · Mathematics 2020-07-10 Andrea Braides , Valeria Chiadò Piat , Lorenza D'Elia