Results 41 to 50 of about 6,720,998 (191)

Fission-fusion dynamics and group-size dependent composition in heterogeneous populations

, 2019
Many animal groups are heterogeneous and may even consist of individuals of different species, called mixed-species flocks. Mathematical and computational models of collective animal movement behaviour, however, typically assume that groups and ...
Guttal, Vishwesha, Iyer, Srikanth K., Nair, Gokul G., Senthilnathan, Athmanathan   +3 more
core   +1 more source

Nontrivial solutions for nonlinear problems with one sided resonance

Electronic Journal of Differential Equations, 2012
We find nontrivial smooth solutions for nonlinear elliptic Dirichlet problems driven by the p-Laplacian ($1<p<infty$), when one sided resonance occurs at the principal spectral interval.
George Smyrlis
doaj  

Existence and multiplicity for a superlinear elliptic problem under a non-quadradicity condition at infinity

Electronic Journal of Differential Equations, 2020
In this article, we study the existence and multiplicity of solutions of the boundary-value problem $$\displaylines{ -\Delta u = f(x,u), \quad \text{in } \Omega, \cr u = 0, \quad \text{on } \partial\Omega, }$$ where $\Delta$ denotes the N ...
Leandro Recova, Adolfo Rumbos
doaj  

Mothers’ groups during critical processes around birth

Psicodebate, 2016
The article describes a clinical experience with groups of mothers of newborns who are ill and must stay in neonatology. This report tries to reflect on single session therapy within support-groups and also on psychologist ́s role when coping with ...
Alicia Mercado
doaj   +1 more source

(p,2)-equations asymmetric at both zero and infinity

Advances in Nonlinear Analysis, 2018
We consider a (p,2){(p,2)}-equation, that is, a nonlinear nonhomogeneous elliptic equation driven by the sum of a p-Laplacian and a Laplacian with p>2{p>2}.
Papageorgiou Nikolaos S., Rădulescu Vicenţiu D., Repovš Dušan D.   +2 more
doaj   +1 more source

SURVEY ON SOLIDARITY GROUPS OF BUYERS: CRITICAL ISSUES

Italian Journal of Food Safety, 2011
This work is intended to provide, through the analysis of the dynamics of purchase of solidarity groups of buyers, a contribution to the study of current trends that are affecting the alternative to the dominant agro-food industry.
L. Pennisi, F. Sili, C. Costanzo, A. Vergara   +3 more
doaj   +1 more source

Critical groups of van Lint-Schrijver Cyclotomic Strongly Regular Graphs

, 2019
The \emph{critical} group of a finite connected graph is an abelian group defined by the Smith normal form of its Laplacian. Let $q$ be a power of a prime and $H$ be a multiplicative subgroup of $K=\mathbb{F}_{q}$.
Pantangi, Venkata Raghu Tej
core   +1 more source

Multiple solutions with sign information for Robin equations with indefinite potential

Bulletin of Mathematical Sciences
In this paper, we study a Robin boundary value problem driven by the Laplace operator plus an indefinite potential term. The reaction is of the logistic type.
Nikolaos S. Papageorgiou, Jian Zhang, Wen Zhang   +2 more
doaj   +1 more source

Critical exponents for groups of isometries [PDF]

Geometriae Dedicata, 2007
Let \(\Gamma\) be a free group acting by isometries on a \(\text{CAT}(-1)\) space \((X,d_X)\) as a convex co-compact group and let \(\Gamma_0\) be a normal subgroup. The author shows that if the quotient group \(\Gamma/\Gamma_0\) is amenable, then \(\delta(\Gamma_0)=\delta(\Gamma)\).
openaire   +1 more source

Multibump solutions and critical groups [PDF]

Transactions of the American Mathematical Society, 2009
We consider the Newtonian system − q ¨ + B ( t ) q = W q ( q , t ) -\ddot q+B(t)q = W_q(q,t) with B B , W W periodic in t ...
ARIOLI, GIANNI, A. SZULKIN, W. ZOU
openaire   +4 more sources