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By applying the tools such as modulus of curves and rings, together with Rohde s theorem, it proves that a homeomorphism is a bi Lipschitz map if and only if it satisfies a logarithmically absolute value inequality of rings.

运用曲线族的模和环模等工具,结合 Rohde定理,证明同胚为双 Lipschitz映射的充要条件是:它适合环的对数绝对值不等式;还得到了同胚为拟共形映射的一个充分条件。

It's really the natural setting for algebraic topology because the traditional algebraic invariants (fundamental group, homolog group,etc.) arc isomorphic not only for homeomorphic spaces but for spaces of the same homotopy type. Homtopy epimorphisms and monomorphisms are special morphisms in the category of topological spaces and the initial research of them may be traceable to S.T.

同伦论的本质是利用比同胚关系更广泛的等价关系—同伦关系来对拓扑空间进行研究,这也是代数拓扑研究中一种自然的考虑,因为传统的代数不变量不仅在同胚的空间之间保持同构,而且在具有相同伦型的空间之间也保持同构。

Secondly, for the boundary correspondence of affine stretch on hyperbolic regions, we prove that the above conclusion is also true. Finally, we pose a sufficient and necessary condition for the same conclusion.

最后利用退化的四边形序列,给出了拟对称同胚的极值拟共形延拓的最大伸缩商、四边形模之比的上确界及拟对称同胚的边界伸缩商三者相等的一个充要条件。

Then it proves a necessary and sufficient condition for anamalgamation of two 3-manifolds with toms boundary with no new incompressible surfaces.Lastly, with the help of the condition and the theorem about the classification of allautomorphisms of a torus, it is proveed that there exists infinitely many 3-manifolds each ofwhich contains no incompressible surfaces besides a torus.

最后,文章给出了以环面作为边界的两个3维流形在作融合积时不产生新的不可压缩曲面的一个充分必要条件,并将这个结果与关于环面到自身的自同胚类的分类的结果相结合,证明了本文的一个核心结论,即存在无穷多个互不同胚的3维流形满足除了一个环面以外不含有其他的不可压缩曲面。

Since the exchange rings with all idempotents central satisfy the general comparability and have stable range1 [100] , this gives a new class of rings for which S K〓(R , is affinely homeomorphic to M〓 BS

若R为正则环,注意到S仿射同胚于P,便立得Goodearl定理[41];因为所有幂等元中心的exchange环满足一般可比性且有稳定度1,这提供了S仿射同胚于M〓的一类新环。

In particular, we obtain a condition for which a homeomorphism is a non-wanderinghomeomorphism.

最后,我们还得到了一个同胚是非游荡同胚的判定条件。

In this thesis, we mainly study the homeomorphism flow properties of solutions for SDEs with jumps and backward stochastic differential equations, and also give some applications.

本文我们将上述结果作了以下两方面的推广,一方面是带跳随机微分方程解的同胚流及其应用,另一方面是倒向随机微分方程解的同胚流及其应用。

It is proved that if a homeomorphism f on a compact metric space with the POTP is distal homeomorphism, then f does not have the average shadowing property.

证明了紧致度量空间中有伪轨跟踪的distal同胚不具有平均跟踪性,并给出了有平均跟踪性的同胚是极小的一个充分条件。

The frequency of polyembryony and twin-embryony in tetraploid species are generally higher than those of diploid.

依胚的大小和发育的完整性可将双胚豆划分为4种类型:双同胚、大小胚、大残胚、双残胚。

The so-called AT-algebras are inductive limits of finite direct sums of matrices over the extension algeras of circle algebra by K, where K is the C~*— algebra of all compact operators on a separable infinite dimensional Hilbert space.

若V_*与V_*同构,且保持单位元等价类;T与T仿射同胚,且同构映射与同胚映射相容,则存在E与E′的同构导出上述同构和同胚,所谓AT-代数即为圆代数通过κ的本质酉扩张的矩阵代数的有限直和的归纳极限,这里κ为可分的无限维复Hilbert空间上的紧算子全体,不变量中的V*为三变元Abel半群,T为迹态空间,[1]为单位元所在的Murray-von Neumann等价类,r_E为连接映射。

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