Factors with prescribed number of invariant subalgebras not arising from subgroups
Abstract
For any given integer n≥ 1, we construct i.c.c. groups G such that the II1 factors L(G) have exactly n-many G-invariant von Neumann subalgebras not arising from subgroups.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.