第二部分(第二章)，着重研究了半群作用的敏感依赖性。
In the second part (Chapter 2), we study the sensitive dependence of semigroup actions.
第三部分(第三章)，着重从半群作用的复杂性函数出发，研究了系统的复杂性。
In the third part (Chapter 3), we study the complexity of semigroup actions using complexity functions of open covers.
具有逆断面的正则半群的格林关系在研究该类半群的性质时起到非常大的作用。
The Green relations on a regular semigroup with inverse transversals play important roles in studying the nature of this sort of semigroup.
应用有限棱柱单元法对群桩与土相互作用系统进行了三维弹塑性分析，并以无限棱柱元模拟半无限空间地基土的边界条件。
In this paper, the three dimensional elastoplastic analysis of a group pile soil interaction system is made by using the finite prism element method.
这些子半群在构造具有逆断面的正则半群中起决定性作用。
These subsemigroups play a decisive role in constructing regular semigroups with an inverse transversal.
这些子半群在构造具有逆断面的正则半群中起决定性作用。
These subsemigroups play a decisive role in constructing regular semigroups with an inverse transversal.
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