此前对微分算子的积算子自伴的研究主要集中于由同一个对称微分算式生成的两个或多个微分算子积的自伴问题上，取得了一些成果。
In this paper, we get the self-adjointness of the product operators generated by different two differential expressions by operator theory and matrix calculation.
我们研究含非稠定闭线性算子的积-微分方程。
Integro-differential equations with nondensely defined linear operators in Banach space was considered.
第一章：引言和预备知识部分，主要是关于微分算子的积算子自伴的研究情况和对称微分算子的一些基本知识。
Chapter one is divided into two parts: in the first part, we give the simple summarize of adjointness of differential operator product;
理论分析与模型试算证明了褶积微分算子法的正确性与有效性。
The theoretical analysis and numerical results show the accuracy and validity of the CD.
理论分析与模型试算证明了褶积微分算子法的正确性与有效性。
The theoretical analysis and numerical results show the accuracy and validity of the CD.
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