Lie groups in the symmetric group: reducing Ulam's problem to the simple case

Autor: Conversano, Annalisa, Monod, Nicolas
Rok vydání: 2023
Předmět:
Zdroj: Journal of Algebra 640 (2024) 106-116
Druh dokumentu: Working Paper
DOI: 10.1016/j.jalgebra.2023.11.006
Popis: Ulam asked whether all Lie groups can be represented faithfully on a countable set. We establish a reduction of Ulam's problem to the case of simple Lie groups. In particular, we solve the problem for all solvable Lie groups and more generally Lie groups with a linear Levi component. It follows that every amenable locally compact second countable group acts faithfully on a countable set.
Databáze: arXiv