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1 Introduction and Main Results LetΩ■Rd(with d≥1)be a bounded domain with a C^2 boundary■Ω.LetωΩbe an open and nonempty subset with its characteristic functionχω.Let A■(aij)1≤i,j≤n∈R^n×n and B■(bij)1≤i≤n,1≤j≤m∈ R^n×m be two constant