Forum Problem Lists Definitions FAQ

19.103 (2018)

Open

Is it true that an intersection of compressed subgroups is compressed? It is known that arbitrary intersections of inert subgroups are inert. (For the definitions, see 19.102)

Contributor: E. Ventura

Progress

*Yes, it is true (A. Jaikin-Zapirain, Preprint, 2024, https://arxiv.org/pdf/2403.09515).

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