On approximation properties of semidirect products of groups

Autor: Arzhantseva, Goulnara, Gal, Światosław R.
Rok vydání: 2013
Předmět:
Zdroj: Annales Math\'ematiques Blaise Pascal, Tome 27 (2020) no. 1, pp. 125-130
Druh dokumentu: Working Paper
DOI: 10.5802/ambp.386
Popis: Let R be a class of groups closed under taking semidirect products with finite kernel and fully residually R-groups. We prove that R contains all R-by-{finitely generated residually finite} groups. It follows that a semidirect product of a finitely generated residually finite group with a surjunctive group is surjunctive. This remained unknown even for direct products of a surjunctive group with the integers Z.
Comment: 6 pages, no figures
Databáze: arXiv