In the first part, some fundamental theorem, symbol, concept are introduced, including some valuable results on linear positive operators.

第一部分简单介绍了本文所涉及到的一些基本定理、符号、概念，以及一些与正线性算子有关的成果。

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By using linear operator theory in L2 space, we proved that the operators of this kind has not more than denumerable positive eigenvalues.

运用L2空间上的线性算子理论，我们证明了这类算子存在至多可数个正的本征值。

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By using linear operator theory in L2 space, we proved that the operators of this kind has not more than denumerable positive eigenvalues.

运用L2空间上的线性算子理论，我们证明了这类算子存在至多可数个正的本征值。

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