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SEMINARS
On cosmetic Dehn surgeries
时间  Datetime
2020-01-13 15:00 — 16:00 
地点  Venue
813
报告人  Speaker
陶然
单位  Affiliation
四川师范大学
邀请人  Host
李友林
报告摘要  Abstract

Two Dehn surgeries on a knot are called purely cosmetic if the resulting manifolds are homeomorphic as oriented manifolds. Gordon conjectured that non-trivial knots in S^3 do not admit purely cosmetic surgeries. In this talk, we will discuss this conjecture in the cases of cable knots and composite knots.