Results 211 to 220 of about 56,089 (229)
Some of the next articles are maybe not open access.
Forward and pullback attraction on pullback attractors
SeMA Journal, 2010Pullback attractors are important elements to study the asymptotic behaviour for nonautonomous PDEs because they copy the pullback dynamic of the system inside them. Although pullback and forward dynamic may not be related, there exist some cases when the trajectories converge forward in time to the pullback attractor.
openaire +1 more source
Pullbacks in Regular Categories
Canadian Mathematical Bulletin, 1973Given a pair of mapsin a category, we would like to know whether they form part of a pullback diagram as follows:I am indebted to Basil Rattray for mentioning the solution of this problem for the category of sets. Here we shall solve it for any regular category in the sense of Barr [1].It will be useful to make the following definition.
openaire +1 more source
Communications in Algebra, 2015
Given two epimorphisms of algebras A ↠ B and C ↠ B, we consider the pullback R. We introduce a particular class of algebras, the tree oriented pullback, where there is a close relationship between the category of indecomposable modules of these algebras. This leads us to prove that if A and C are hereditary algebras, then R is a tilted algebra.
Viktor Bekkert +2 more
openaire +1 more source
Given two epimorphisms of algebras A ↠ B and C ↠ B, we consider the pullback R. We introduce a particular class of algebras, the tree oriented pullback, where there is a close relationship between the category of indecomposable modules of these algebras. This leads us to prove that if A and C are hereditary algebras, then R is a tilted algebra.
Viktor Bekkert +2 more
openaire +1 more source
Communications in Algebra, 2009
Geometric invariant theory can be used to construct moduli spaces associated to representations of finite dimensional algebras. One difficulty which occurs in various natural cases is that nonisomorphic modules are sent to the same point in the moduli spaces which arise.
Frauke M. Bleher, Ted Chinburg
openaire +1 more source
Geometric invariant theory can be used to construct moduli spaces associated to representations of finite dimensional algebras. One difficulty which occurs in various natural cases is that nonisomorphic modules are sent to the same point in the moduli spaces which arise.
Frauke M. Bleher, Ted Chinburg
openaire +1 more source
Pullback trajectory attractors
Evolution Equations and Control TheoryzbMATH Open Web Interface contents unavailable due to conflicting licenses.
Samprogna, Rodrigo Antonio +1 more
openaire +1 more source
Pullback in Partial Morphism Categories
Applied Categorical Structures, 2015zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shir Ali Nasab, A. R., Hosseini, S. N.
openaire +1 more source
2017
The aim of this course is the study of the pullback equation. More precisely we want to find a map \(\varphi: \mathbb{R}^{n} \rightarrow \mathbb{R}^{n},\) preferably we want this map to be a diffeomorphism, that satisfies the above equation, where f, g are differential k-forms, 0 ≤ k ≤ n. Most of the time we will require these two forms to be closed.
openaire +1 more source
The aim of this course is the study of the pullback equation. More precisely we want to find a map \(\varphi: \mathbb{R}^{n} \rightarrow \mathbb{R}^{n},\) preferably we want this map to be a diffeomorphism, that satisfies the above equation, where f, g are differential k-forms, 0 ≤ k ≤ n. Most of the time we will require these two forms to be closed.
openaire +1 more source
2012
The global attractor, whose well established definition we recall below, is an object that captures the asymptotic behaviour of autonomous systems. The aim of this chapter is to introduce the ‘pullback attractor’, which seems to be the correct generalisation of this concept for use with non-autonomous processes.
Alexandre N. Carvalho +2 more
openaire +1 more source
The global attractor, whose well established definition we recall below, is an object that captures the asymptotic behaviour of autonomous systems. The aim of this chapter is to introduce the ‘pullback attractor’, which seems to be the correct generalisation of this concept for use with non-autonomous processes.
Alexandre N. Carvalho +2 more
openaire +1 more source
1991
We interrupt our study of differential calculus to apply the results of Section 4 of Chapter 7 to the outstanding problem of evaluating pullbacks.
openaire +1 more source
We interrupt our study of differential calculus to apply the results of Section 4 of Chapter 7 to the outstanding problem of evaluating pullbacks.
openaire +1 more source
Pullback Grammars Are Context-Free
2008Following earlier work on pullback rewriting, we describe here the notion of graph grammar relevant to our formalism. We then show that pullback grammars are context-free and provide a surprising example, namely the context-free generation of square grids.
Ly, Olivier, Chen, Rui, Bauderon, Michel
openaire +2 more sources