1) ω-limit set
开子树
2) open subsystems
开子系统
1.
The authors introduce the concepts of subsystems,open subsystems and closed subsystems of a topological system,and show that any subsystem D of a topological system E is a regular subobject in the category of topological systems.
给出了拓扑系统的子系统、开子系统与闭子系统的定义。
3) [U,V] subset
[U,V]开子集
4) compactly closed subset[compactly open subset]
紧闭子集[集开子集]
补充资料：龙树开铁塔传密教
【龙树开铁塔传密教】
（传说）(参见：铁塔)
（传说）(参见：铁塔)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。