Results 91 to 100 of about 70,846 (249)

An intermediate term functor logic

open access: yesArgumentos, 2019
Neste artigo, tentamos fazer algo bastante simples: conhecer os avanços de Sommers e Englebretsen (a saber, uma álgebra mais-menos para silogística) juntamente com os desenvolvimentos de Peterson e Thompson (ou seja, uma extensão da silogística com “a ...
José Martin Castro Manzano
doaj   +3 more sources

Homotopy for Functors [PDF]

open access: yesProceedings of the American Mathematical Society, 1972
We show that natural transformations play the role of homotopy for (covariant) functors. Homotopic functors are shown to induce identical maps between the homology groups of categories. For a space X, there is an associated category AS(X). We show that the classifying space of AS(X) has the same homotopy type as X if X is a CW complex.
openaire   +3 more sources

Equivariant extensions of *-algebras

open access: yes, 2010
A bivariant functor is defined on a category of *-algebras and a category of operator ideals, both with actions of a second countable group $G$, into the category of abelian monoids. The element of the bivariant functor will be $G$-equivariant extensions
Goffeng, Magnus
core  

Probability measure monad on the category of ultrametric spaces

open access: yesApplied General Topology, 2008
The set of all probability measures with compact support on an ultrametric space can be endowed with a natural ultrametric. We show that the functor of probability measures with finite supports (respectively compact supports) forms a monad in the ...
O.B. Hubal, M.M. Zarichnyi
doaj   +1 more source

Constructing Applicative Functors [PDF]

open access: yes, 2012
Applicative functors define an interface to computation that is more general, and correspondingly weaker, than that of monads. First used in parser libraries, they are now seeing a wide range of applications. This paper sets out to explore the space of non-monadic applicative functors useful in programming.
openaire   +2 more sources

Underlying functors on fibered manifolds

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2004
For a product preserving bundle functor on the category of fibered manifolds we describe subordinated functors and we introduce the concept of the underlying functor. We also show that there is an affine bundle structure on product preserving functors on
Miroslav Doupovec
doaj  

Derived Mackey Functors

open access: yesMoscow Mathematical Journal, 2011
For a finite group $G$, the so-called $G$-Mackey functors form an abelian category $M(G)$ that has many applications in the study of $G$-equivariant stable homotopy. One would expect that the derived category $D(M(G))$ would be similarly important as the "homological" counterpart of the $G$-equivariant stable homotopy category.
openaire   +2 more sources

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