三商映射是完备映射和开映射的共同推广。
Tri quotient maps are a common generalization of perfect maps and open maps.
引进了紧商映射与紧商拓扑的概念，系统地讨论了它们的性质，得到若干有趣的结果。
In this paper, we introduce the concept of compact quotient mapping and compact quotient topology, discuss systematically their basic properties and establish some interesting results.
事实上，不同的厂商映射端口的方式略有不同，所以你可能只有大约4000个端口是可用的。
Realistically, since different manufacturers map the ports in slightly different ways, you can expect to have about 4,000 ports available.
利用指数对应定理，将关于商映射的一个定理推广到上诱导拓扑的情形，并给出其在代数拓扑学中的若干应用。
Used the theorem of exponential correspondence, a theorem on quotient map was generalized to the cases of coinduced topology, and some applications of it in algebraic topology were also discussed.
利用指数对应定理，将关于商映射的一个定理推广到上诱导拓扑的情形，并给出其在代数拓扑学中的若干应用。
Used the theorem of exponential correspondence, a theorem on quotient map was generalized to the cases of coinduced topology, and some applications of it in algebraic topology were also discussed.
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