Generalization of order separability for free products and omnipotence of free products of groups

Virtual retractions, conjugacy separability and omnipotence

We use wreath products to provide criteria for a group to be conjugacy separable or omnipotent. These criteria are in terms of virtual retractions onto cyclic subgroups. We give two applications: a straightforward topological proof of the theorem of Stebe that infinite-order elements of Fuchsian groups (of the first type) are conjugacy distinguished, and a proof that surface groups are omnipotent.

Generalization of order separability for free groups

In this work the author studies the property close to property of order separability.

论群的某些扩张的广义（扭曲）共轭可分性

On generalized (twisted) conjugacy separability of some extensions of groups

引入广义共轭可分性性质，证明群$G$在有限与循环扩张下扭曲共轭、Brinkmann共轭等可分性的等价与蕴含关系，并应用于自由群等群类。

Artin群的子群可分性 II

Subgroup Separability of Artin Groups II

本研究建立了判定Artin群子群可分性（LERF）的新准则，证明其等价于不含特定诱导子图，推广了Metaftsis-Raptis准则，并得出Artin群为ERF的充要条件及子群可分性与凝聚性的关联。

Separability Properties of Nilpotent $\mathbb{Q}[x]$-Powered Groups

In this paper we study conjugacy and subgroup separability properties in the class of nilpotent $\mathbb{Q}[x]$-powered groups. Many of the techniques used to study these properties in the context of ordinary nilpotent groups carry over naturally to this more general class. Among other results, we offer a generalization of a theorem due to G. Baumslag. The generalized version states that if $G$ is a finitely $\mathbb{Q}[x]$-generated $\mathbb{Q}[x]$-torsion-free nilpotent $\mathbb{Q}[x]$-powered group and $H$ is a $\mathbb{Q}[x]$-isolated subgroup of $G,$ then for any prime $π\in \mathbb{Q}[x]…