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CRITICAL EXPONENTS OF ERBIUM [PDF]

open access: bronzeLe Journal de Physique Colloques, 1988
The exponent β that describes the sinusoidally modulate d ↔ paramagnetic phase transition crosses over from a value of 0.39 near TN to a mean field value away from TN. Electrical resistivity measurements near TN are given for the c axis and the critical behaviour is discussed.
P. de V. du Plessis   +2 more
openalex   +3 more sources

Concentration phenomena for fourth-order elliptic equations with critical exponent

open access: yesElectronic Journal of Differential Equations, 2004
We consider the nonlinear equation $$ Delta ^2u= u^{frac{n+4}{n-4}}-varepsilon u $$ with $u$ greater than 0 in $Omega$ and $u=Delta u=0$ on $partialOmega$. Where $Omega$ is a smooth bounded domain in $mathbb{R}^n$, $ngeq 9$, and $varepsilon$ is a small
Mokhless Hammami
doaj  

A Brezis-Nirenberg problem on hyperbolic spaces

open access: yesElectronic Journal of Differential Equations, 2019
We consider a Brezis-Nirenberg problem on the hyperbolic space $\mathbb{H}^n$. By using the stereographic projection, the problem becomes a singular problem on the boundary of the open ball $B_1(0)\subset \mathbb{R}^n$. Thanks to the Hardy inequality,
Paulo C. Carriao   +3 more
doaj  

Nondegeneracy of the solutions for elliptic problem with critical exponent

open access: yesBoundary Value Problems
This paper deals with the following nonlinear elliptic equation: − Δ u = Q ( | y ′ | , y ″ ) u N + 2 N − 2 , u > 0 , in R N , u ∈ D 1 , 2 ( R N ) , $$ -\Delta u=Q(|y'|,y'')u^{\frac{N+2}{N-2}},\,\,u>0,\,\,\text{in}\,{ \mathbb{R}}^{N},\,\,u\in D^{1,2 ...
Qingfang Wang
doaj   +1 more source

On the Sobolev trace Theorem for variable exponent spaces in the critical range [PDF]

open access: green, 2013
Julián Fernández Bonder   +2 more
openalex   +1 more source

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