Topological invariant
- 网络拓扑不变量
Topological invariant-
Quantitative Index of Topological Invariant for Molecule
分子拓扑不变量的定量指标
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The authors first introduce a new topological invariant , the PD-function ( pseudo decomposition function ) of a transitive system , by the investigation of the pseudo decomposition of a transitive system ( X , f ) under the action of fn , n ∈ N.
通过对传递系统（X，f）在fn，n∈N的作用下的伪分解，先引入一个新的拓扑不变量传递系统的PD函数（伪分解函数）。
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As one of spatial relations , spatial topological relation refers to topological invariant of topological transformation ( translation , rotation , scaling and so on ) .
空间拓扑关系是空间关系的一种，它是指拓扑变换（平移、旋转、缩放等）下的拓扑不变量。