BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:From Calabi–Yau Singularities to 6D Gravitational Anomaly Cancel lation DTSTART:20261015T071000Z DTEND:20261015T081000Z DTSTAMP:20261102T055800Z UID:indico-event-31113@indico.ihep.ac.cn DESCRIPTION:Speakers: Kai Xu (Tsinghua University)\n\nSix-dimensional F-th eory compactifications provide a geometric framework for constructing UV c omplete quantum theory of gravity\, in which gauge symmetries and charged matter arise from singularities of elliptically fibered Calabi–Yau three folds. An important consistency condition on these theories is the cancell ation of gravitational anomalies.I will first review this physical picture and explain how matters localize at singularities\, then explain how six- dimensional matter representations can be constructed from the CoHA/BPS co homology of resolved cDV singularities\, equipped with a natural action of the gauge algebra. Finally\, I will give a geometric derivation of the 6D gravitational anomaly cancellation condition\, reducing it through five-d imensional Coulomb/Higgs branch physics to a local statement about singula rities of elliptic Calabi–Yau threefolds.About the speaker:Kai Xu is an Assistant Professor at the Yau Mathematical Sciences Center (YMSC)\, Tsing hua University. He received his Ph.D. in Mathematics from Harvard Universi ty and subsequently held a postdoctoral fellowship in the Department of Ph ysics at Harvard. His research lies at the interface of algebraic geometry \, string theory\, and quantum gravity.\n\nhttps://indico.ihep.ac.cn/event /31113/ LOCATION:B105 (CHEP) URL:https://indico.ihep.ac.cn/event/31113/ END:VEVENT END:VCALENDAR