content_image/327446.jpg content_image/327447.jpg content_image/327448.jpg content_image/327449.jpg content_image/327451.jpg content_image/327450.jpg
We set 

<img src='content_image/327446.jpg'>

where a$_{i}$, b$_{j}$ ∈ L $^{∞}$(Ω) , 0 ≤ i ≤ n, 1 ≤ j ≤ m. 

Proposition 1 Let us assume that 0 < α, β < 1 be small and γ > 0 be sufficiently large, and let 

<img src='content_image/327447.jpg'>

with some δ$_{0}$ > 0 . Then there exist constants C > 0 and s$_{0}$ > 0 such that 

for all s ≥ s$_{0}$, provided that 

Proof Let us set 

and 

<img src='content_image/327448.jpg'>

<img src='content_image/327449.jpg'>

<img src='content_image/327451.jpg'>

<img src='content_image/327450.jpg'>

