<0000-0001-5371-3168> . "Baumslag-Solitar groups"@en . "Yves Stalder" . "Free groups"@en . "Space of subgroups"@en . "Groups acting on trees"@en . "Infinite conjugacy classes"@en . "Random graph"@en . "Turing degree"@en . "Ultralimits"@en . "Baumslag\u2013Solitar groups"@en . "Proper group actions"@en . . "Property FRA"@en . "HNN extensions"@en . "Hausdorff dimension"@en . "CAT0 cube complexes"@en . "Spaces with walls"@en . "Free products"@en . "Uniform actions"@en . "Yves" . "Haagerup property"@en . "Wreath products"@en . "Hilbert space compression"@en . "Stalder" . "Perfect kernel"@en . "Maximal abelian subalgebras"@en . "Hilbert spaces"@en . "Homogeneous actions"@en . "Baire category theorem"@en . "b77d1039b7abe616e3b2073bfe1b3951" . "Compression"@en . "Residual solvability"@en . . "Mixing actions"@en . "Topological transitive actions"@en . "Amenable actions"@en . "Property T"@en . "Crossed products"@en . "Space of marked groups"@en . "Trees"@en . . "Highly transitive actions"@en . "High transitivity"@en . "Amalgamated products"@en . . . "Bass-Serre theory"@en . "Von Neumann algebras"@en . "Inner amenability"@en .