Topological groups with fixed point on compacta property and potentially dense subsets of groups

在紧致性上具有不动点的拓扑群和群的潜在稠密子集

基本信息

批准号：
20K03615
负责人：
D・B Shakhmatov
金额：
$ 2.75万
依托单位：
Ehime University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2020
资助国家：
日本
起止时间：
2020-04-01 至 2025-03-31
项目状态：
未结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K03615/
关键词：
Zariski topology Markov topology Hausdorff embedding extension of topologies free group algebraic set unconditionally closed precompact topology automorphism group general linear group special orthogonal group Euclid space subsemig

项目摘要

Let G be a group, and let w be a word in the free product G*Z of G with the cyclic group Z (whose generator is denoted by z). The solution set of an equation w=1 is the set of all elements x of G*Z such that w'=1, where w' is the word obtained from w by replacing all occurencies of z in w with x. The Zariski (verbal) topology of a group G is the smallest topology on G in which solution set of all equations w=1 in G are closed.A subset of a group G is unconditionally closed in G if it is closed in every Hausdorff group topology on G. The family of all unconditionally closed subsets of G forms the family of closed subsets of a unique topology on G called its Markov topology.A subgroup H of a group G is Zariski (Markov) embedded in G if the Zariski (Markov) topology of H is the subspace topology it inherits from the Zariski (Markov) topology of G. A subgroup H of a group G is Hausdorff embedded in G if every Hausdorff group topology on H can be extended to a Hausdorff group topology of G in such a way that the original topology becomes a subgroup topology. We prove that every subgroup of a free group is both Zariski and Markov embedded in it. On the other hand, we construct a normal subgroup of a free group with 2 generators which is not Hausdorff embedded in it.

令G为一个组，然后用循环Z（其发电机用Z表示）在G的自由乘积G*z中的一个单词。方程w = 1的解集是g*z的所有元素x的集合，使得w'= 1，其中w'是通过用x在w中替换z的所有情况从w中获得的单词。 The Zariski (verbal) topology of a group G is the smallest topology on G in which solution set of all equations w=1 in G are closed.A subset of a group G is unconditionally closed in G if it is closed in every Hausdorff group topology on G. The family of all unconditionally closed subsets of G forms the family of closed subsets of a unique topology on G called its Markov topology.A subgroup H of a group G is如果H的Zariski（Markov）拓扑是它从G的Zariski（Markov）拓扑继承的Zariski（马尔可夫）。拓扑。我们证明，一个自由组的每个子组既是Zariski，又嵌入了Markov。另一方面，我们构建了一个自由组的正常子组，该子组带有2个发电机，而不是嵌入其中的Hausdorff。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Zariski and (precompact) Markov topologies in free groups and their subgroups

自由群及其子群中的 Zariski 和（预紧）马尔可夫拓扑

DOI：
发表时间：
2022
期刊：
影响因子：
0
作者：
Shota Hoshinaga;Ikkei Hotta and Hiroshi Yanagihara;Dmitri Shakhmatov
通讯作者：
Dmitri Shakhmatov

Star-covering properties and neighhbourhood assignments

明星覆盖的房产和社区分配

DOI：
发表时间：
2023
期刊：
Atti Accad. Peloritana Pericolanti Cl. Sci. Fis. Mat. Natur.
影响因子：
0
作者：
Fortunata Aurora Basile;Maddalena Bonanzinga;Fortunato Maesano;Dmitri B. Shakhmatov
通讯作者：
Dmitri B. Shakhmatov

Automorphism groups of dense subgroups of R^n

R^n 的稠密子群的自同构群