scholarly journals A Local Estimate for the Maximal Function in Lebesgue Spaces with EXP-Type Exponents

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Alberto Fiorenza

It is proven that if1≤p(·)<∞in a bounded domainΩ⊂Rnand ifp(·)∈EXPa(Ω)for somea>0, then givenf∈Lp(·)(Ω), the Hardy-Littlewood maximal function off,Mf, is such thatp(·)log(Mf)∈EXPa/(a+1)(Ω). Becausea/(a+1)<1, the thesis is slightly weaker than(Mf)λp(·)∈L1(Ω)for someλ>0. The assumption thatp(·)∈EXPa(Ω)for somea>0is proven to be optimal in the framework of the Orlicz spaces to obtainp(·)log(Mf)in the same class of spaces.

2014 ◽  
pp. 187-188
Author(s):  
Omar El-Fallah ◽  
Karim Kellay ◽  
Javad Mashreghi ◽  
Thomas Ransford

2013 ◽  
Vol 11 (03) ◽  
pp. 1350005 ◽  
Author(s):  
ZHONG TAN ◽  
FEI FANG

Let Ω be a bounded domain in RNwith smooth boundary ∂Ω. In this paper, the following Dirichlet problem for N-Laplacian equations (N > 1) are considered: [Formula: see text] We assume that the nonlinearity f(x, t) is sub-exponential growth. In fact, we will prove the mapping f(x, ⋅): LA(Ω) ↦ LÃ(Ω) is continuous, where LA(Ω) and LÃ(Ω) are Orlicz spaces. Applying this result, the compactness conditions would be obtained. Hence, we may use Morse theory to obtain existence of nontrivial solutions for problem (N).


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