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中文摘要：
【正】 In this paper, a sufficient and necessary condition is obtained to ensure that the spectrum of a class of 2n-order weighted differential operators is discrete. The proof is based on the method of certain weighted Sobolev spaces to be compactly embedded in weighted L2(R).
英文摘要：
In this paper, a sufficient and necessary condition is obtained to ensure that the spectrum of a class of 2n-order weighted differential operators is discrete. The proof is based on the method of certain weighted Sobolev spaces to be compactly embedded in weighted L2(R).
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