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Boundedness and compactness of the embedding between spaces with multiweighted derivatives when 1 q < p <

Zamira AbdikalikovaRyskul OinarovLars-Erik Persson — 2011

Czechoslovak Mathematical Journal

We consider a new Sobolev type function space called the space with multiweighted derivatives W p , α ¯ n , where α ¯ = ( α 0 , α 1 , ... , α n ) , α i , i = 0 , 1 , ... , n , and f W p , α ¯ n = D α ¯ n f p + i = 0 n - 1 | D α ¯ i f ( 1 ) | , D α ¯ 0 f ( t ) = t α 0 f ( t ) , D α ¯ i f ( t ) = t α i d d t D α ¯ i - 1 f ( t ) , i = 1 , 2 , ... , n . We establish necessary and sufficient conditions for the boundedness and compactness of the embedding W p , α ¯ n W q , β ¯ m , when 1 q < p < , 0 m < n .

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