BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Hoang Thanh Nguyen (FPT University\, DaNang) DTSTART:20250603T130000Z DTEND:20250603T150000Z DTSTAMP:20260423T041009Z UID:WienGAGT/47 DESCRIPTION:Title: Quasi-redirecting boundaries of groups\nby Hoang Thanh Nguyen (FPT U niversity\, DaNang) as part of Vienna Geometry and Analysis on Groups Semi nar\n\n\nAbstract\nQing and Rafi recently introduced a new boundary for me tric spaces\, called the quasi-redirecting (QR) boundary. This boundary is quasi-isometry invariant\, often compact\, and contains the sublinearly M orse boundary as a topological subspace. While the existence of the QR bou ndary for all finitely generated groups remains an open question\, we esta blish well-defined QR boundaries for several well-studied classes of group s\, including relatively hyperbolic groups and all finitely generated 3-ma nifold groups.\n\nWe also demonstrate a connection between the QR boundary and the divergence of groups: groups with linear divergence have single-p oint QR boundaries\, whereas certain groups with quadratic divergence\, su ch as graph manifolds and CAT(0) admissible groups\, have QR posets of hei ght 2. Some open questions will be discussed if time permits.\n\nThis talk is based on joint work with Yulan Qing.\n LOCATION:https://researchseminars.org/talk/WienGAGT/47/ END:VEVENT END:VCALENDAR