在拓扑学中，同胚(homeomorphism、topological isomorphism、bi continuous function)是两个拓扑空间之间的双连续函数。同胚是拓扑空间范畴中的同构。
Thirdly, we consider the n-dimensional Duffing type equation with damping term. By virtue of homeomorphism, extension and fixed point method, we discuss the existence of periodic solution under the nonresonance condition.
再次，我们考虑n维的带有阻尼项的Duffing型方程，运用同胚延拓及不动点方法，讨论了非共振条件下周期解的存在性问题。
参考来源 - Liénard方程和非共振Duffing方程研究In the last section, we discussed the week homeomorphic classification of graphlike manifolds.
最后一节讨论了图式流形的弱同胚分类。
参考来源 - 关于同伦正则态射及其应用·2,447,543篇论文数据，部分数据来源于NoteExpress
并推广了微分同胚的有关结果。
同胚映射和同伦等价是代数拓扑学中的两个重要概念。
Homeomorphic morphism and homotopy equivalence are two important concepts in the theory of algebraic topology.
用拓扑度研究了压缩-紧的同胚映射和单调的同胚映射。
In this paper, we investigate the homeomorphism for contract - condensing mappings and monotone mappings by using topological degree.
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