BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Boaz Klartag (Prof.) DTSTART:20260128T160000Z DTEND:20260128T170000Z DTSTAMP:20260602T182129Z UID:th21/1 DESCRIPTION:Title: Sph ere packing\nby Boaz Klartag (Prof.) as part of Theorems of the 21st C entury Seminar\n\nLecture held in Online only.\n\nAbstract\nProf. Boaz Kla rtag is a world-leading expert in high-dimensional geometry with a long tr ack record of solving central open questions in the area. In this talk\, h e will present a significant breakthrough in the classical problem of sphe re packing.\n\nFor more details\, see the blog announcement of this talk a t https://functor.network/user/3333/entry/1591\n\nFor other talks in this series\, visit https://th21.le.ac.uk/next-talks/\n LOCATION:https://researchseminars.org/talk/th21/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Avi Wigderson (Prof.) DTSTART:20260211T160000Z DTEND:20260211T170000Z DTSTAMP:20260602T182129Z UID:th21/2 DESCRIPTION:Title: Exp ander graphs\nby Avi Wigderson (Prof.) as part of Theorems of the 21st Century Seminar\n\nLecture held in Online only.\n\nAbstract\nProf. Avi Wi gderson is a world-leading mathematician and computer scientist specializi ng in algorithms and complexity theory. His fundamental contributions have been recognized with the highest awards\, including the Abel Prize (widel y considered the “Nobel Prize of Mathematics”) and the Turing Award (t he highest distinction in computer science\, often referred to as the “N obel Prize of Computing”). In this talk\, he will discuss expander graph s\, their constructions\, and their applications.\n\nFor the information a bout other talks in this series\, visit https://th21.le.ac.uk/next-talks/\ n LOCATION:https://researchseminars.org/talk/th21/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Assaf Naor (Prof.) DTSTART:20260304T160000Z DTEND:20260304T170000Z DTSTAMP:20260602T182129Z UID:th21/3 DESCRIPTION:Title: Spa rsest cut\nby Assaf Naor (Prof.) as part of Theorems of the 21st Centu ry Seminar\n\nLecture held in Online only.\n\nAbstract\nProf. Assaf Naor i s a world-leading mathematician known for his groundbreaking contributions at the interface of metric geometry\, analysis\, and approximation algori thms. His work has earned numerous major distinctions\, including the Nemm ers Prize in Mathematics\, the Ostrowski Prize\, and the Bôcher Memorial Prize. In this talk\, he will discuss the Sparsest Cut problem\, explain i ts significance in algorithm design\, and present recent algorithm for its efficient approximation\, which is a culmination of decades of work.\n LOCATION:https://researchseminars.org/talk/th21/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Harald Helfgott (Prof.) DTSTART:20260415T150000Z DTEND:20260415T160000Z DTSTAMP:20260602T182129Z UID:th21/4 DESCRIPTION:Title: Gro wth\, expansion and escape in groups\nby Harald Helfgott (Prof.) as pa rt of Theorems of the 21st Century Seminar\n\nLecture held in Online only. \n\nAbstract\nProf. Harald Helfgott is a leading mathematician who made fu ndamental contribution to number theory\, group theory\, and additive comb inatorics. He is widely known for his proof of the ternary Goldbach conjec ture\, as well as for foundational contributions to the study of growth an d expansion phenomena in groups. In this talk\, he will discuss growth and expansion in groups\, including progress toward the celebrated Babai conj ecture on the diameters of finite simple groups. See the blog announcemen t of this talk https://functor.network/user/3333/entry/1724 for more deta ils.\n LOCATION:https://researchseminars.org/talk/th21/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Ben Green (Prof.) DTSTART:20260520T150000Z DTEND:20260520T160000Z DTSTAMP:20260602T182129Z UID:th21/5 DESCRIPTION:Title: The polynomial Freiman-Ruzsa conjecture\nby Ben Green (Prof.) as part of Theorems of the 21st Century Seminar\n\nLecture held in Online only.\n\nAb stract\nProf. Ben Green is an internationally renowned mathematician whose work spans additive combinatorics\, number theory\, and related areas of analysis. He is widely known for groundbreaking contributions such as the Green–Tao theorem on arithmetic progressions in the primes\, and has rec eived numerous prestigious awards in recognition of his influence on moder n mathematics. In this talk\, he will discuss the polynomial Freiman–Ruz sa conjecture\, outlining its background\, key ideas\, and recent resoluti on\, as well as its role in shaping current research in additive combinato rics. See the blog announcement of this talk for more details at https://f unctor.network/user/3333/entry/1757\n LOCATION:https://researchseminars.org/talk/th21/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Andrew Lobb and Joshua Greene (Prof.) DTSTART:20260610T150000Z DTEND:20260610T160000Z DTSTAMP:20260602T182129Z UID:th21/6 DESCRIPTION:Title: Ins cription Problems and Symplectic Geometry\nby Andrew Lobb and Joshua G reene (Prof.) as part of Theorems of the 21st Century Seminar\n\nInteracti ve livestream: https://teams.microsoft.com/meet/347806020565562?p=697eyDB6 J31i9WHT5D\nLecture held in Online only.\n\nAbstract\nProf. Andrew Lobb an d Prof. Joshua Greene are leading mathematicians whose work has made impor tant contributions to several areas of geometry and topology. In this talk \, they will discuss recent progress on classical inscription problems\, i ncluding striking results showing that every smooth Jordan curve inscribes a rectangle similar to any prescribed rectangle\, and more generally a cy clic quadrilateral similar to any prescribed cyclic quadrilateral. The tal k will highlight the ideas behind these theorems and explain the connectio n to symplectic geometry. See the blog announcement https://functor.networ k/user/3333/entry/1813 of this talk for more details.\n LOCATION:https://researchseminars.org/talk/th21/6/ URL:https://teams.microsoft.com/meet/347806020565562?p=697eyDB6J31i9WHT5D END:VEVENT END:VCALENDAR