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。
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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