引入了卡氏和张量混合积空间上的对称化算子和相应的分块矩阵上的混合矩阵函数，给出了关于它们的若干关系式。
Symmetrizing operators on mixed cartesian and tensor product spaces and corresponding mixed matrix functions on partitioned matrices are introduced. Some relation formulae on them are given.
边界型求积公式正是仅仅利用被积函数在区域边界上的数值构造的公式。
The boundary type cubature is quite the type of formulae that only use numerical values on the boundary of the domain.
确定卷积积分的积分限和在相应区间上的被积函数是计算卷积积分的两个难点。
There are two difficult points in convolution integral: how to determine the limit of the integral, and the integrands on the convolution integral.
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