20F50 3 20B35 2 20E08 2 20F28 2 diagonal embedding 2 direct limit 2 group automorphisms 2 homogeneous symmetric group 2 local isometry 2 rooted tree 2 20E32; 20E08 1 37A15 1 diagonal embeddings 1 direct limits 1 hierarchomorphism 1 hierarhomorphism 1 locally finite simple groups 1 measure-preserving actions 1