Results 11 to 20 of about 50,923 (254)

A rainbow blow‐up lemma

open access: yesRandom Structures & Algorithms, 2020
We prove a rainbow version of the blow‐up lemma of Komlós, Sárközy, and Szemerédi for μn‐bounded edge colorings. This enables the systematic study of rainbow embeddings of bounded degree spanning subgraphs. As one application, we show how our blow‐up lemma can be used to transfer the bandwidth theorem of Böttcher, Schacht, and Taraz to the rainbow ...
Glock, Stefan, Joos, Felix
openaire   +3 more sources

Field patterns without blow up

open access: yesNew Journal of Physics, 2017
Field patterns, first proposed by the authors in Milton and Mattei (2017 Proc. R. Soc. A 473 20160819), are a new type of wave propagating along orderly patterns of characteristic lines which arise in specific space-time microstructures whose geometry in
Ornella Mattei, Graeme W Milton
doaj   +1 more source

Blow-up analysis in a quasilinear parabolic system coupled via nonlinear boundary flux

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
This paper deals with the blow-up of the solution for a system of evolution $p$-Laplacian equations $u_{it}=\text{div}(|\nabla u_{i}|^{p-2}\nabla u_{i})\;(i=1,2,\dots,k)$ with nonlinear boundary flux.
Pan Zheng, Zhonghua Xu, Zhangqin Gao
doaj   +1 more source

Blow-Up Sequences and Blow-Up Limits

open access: yes, 2022
AbstractLet D be an open set in $$\mathbb {R}^d$$ ℝ d and $$u:D\to \mathbb {R}$$ u : D → ℝ
openaire   +1 more source

Stability of the blow-up time and the blow-up set underperturbations

open access: yesDiscrete and Continuous Dynamical Systems, 2010
In this paper we prove a general result concerning continuity of the blow-up time and the blow-up set for an evolution problem under perturbations. This result is based on some convergence of the perturbations for times smaller than the blow-up time of the unperturbed problem together with uniform bounds on the blow-up rates of the perturbed problems ...
Arrieta Algarra, José María   +3 more
openaire   +4 more sources

Blow-up for a degenerate and singular parabolic equation with a nonlocal source

open access: yesAdvances in Difference Equations, 2019
This article studies the blow-up phenomenon for a degenerate and singular parabolic problem. Conditions for the local and global existence of solutions for the problem are given.
Nitithorn Sukwong   +3 more
doaj   +1 more source

A hypergraph blow‐up lemma [PDF]

open access: yesRandom Structures & Algorithms, 2011
AbstractWe obtain a hypergraph generalisation of the graph blow‐up lemma proved by Komlós, Sarközy and Szemerédi, showing that hypergraphs with sufficient regularity and no atypical vertices behave as if they were complete for the purpose of embedding bounded degree hypergraphs. © 2011 Wiley Periodicals, Inc. Random Struct.
openaire   +2 more sources

Blow-up phenomena and lifespan for a quasi-linear pseudo-parabolic equation at arbitrary initial energy level

open access: yesBoundary Value Problems, 2018
In this paper, we continue to study the initial boundary value problem of the quasi-linear pseudo-parabolic equation ut−△ut−△u−div(|∇u|2q∇u)=up $$ u_{t}-\triangle u_{t}-\triangle u-\operatorname{div}\bigl(| \nabla u|^{2q}\nabla u\bigr)=u^{p} $$ which was
Gongwei Liu, Ruimin Zhao
doaj   +1 more source

Similarity stabilizes blow up [PDF]

open access: yesJournal of Differential Equations, 1999
The blow-up of solutions to a quasilinear heat equation is studied using a similarity transformation that turns the equation into a nonlocal equation whose steady solutions are stable. This allows energy methods to be used, instead of the comparison principles used previously.
openaire   +2 more sources

Fundamental groups of blow-ups

open access: yesAdvances in Mathematics, 2003
Many examples of nonpositively curved closed manifolds arise as blow-ups of projective hyperplane arrangements. If the hyperplane arrangement is associated to a finite reflection group W, and the blow-up locus is W-invariant, then the resulting manifold M will admit a cell decomposition whose maximal cells are all combinatorially isomorphic to a given ...
Davis, M, Januszkiewicz, T, Scott, R
openaire   +2 more sources

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