本文通过群作用和正则覆盖，利用拓扑刚性定理对此问题给出一个判定性条件。
By the use of group action and normal covering we give an answer in some conditions from topological rigidity theorem in this article.
根据这些定理，给出了基于MVD模式矩阵的多值依赖最小覆盖算法。
Based on these theorems, gives the minimum cover algorithm of the multivalued dependency based on the MVD schema matrix.
给出了积分中值定理的一个注记，证明了中值点的存在性与覆盖中值点的区间的存在性是相互对应的。
By increasing the condition of the integral mean value theorem, we prove that the existence of intermediate point and the existence of interval are corresponding to each other.
在具有(H)性质的拓扑空间中证明了一些新的广义l -KK M型定理，并进一步获得了关于开覆盖的匹配定理。
Some new generalized L-KKM type theorems are proves in a topological space with property (h), furthermore, matching theorems with open cover are obtained.
引进了拟块有向边覆盖对角占优矩阵概念，给出了新的矩阵非奇异判定定理和特征值分布定理。
We introduced the concept of block directed edge cover diagonal quasi dominant matrix, obtained a new nonsingularity criteria for matrices and distribution theorem on eigenvalues of matrix.
引进了拟块有向边覆盖对角占优矩阵概念，给出了新的矩阵非奇异判定定理和特征值分布定理。
We introduced the concept of block directed edge cover diagonal quasi dominant matrix, obtained a new nonsingularity criteria for matrices and distribution theorem on eigenvalues of matrix.
应用推荐