新着情報

トポロジーセミナー(2018/10/30)

日時:2018年10月30日(火)16:00〜17:00

場所:筑波大学自然系学系D棟D814

講演者:Jung Hoon Lee 氏 (Chonbuk National University)

講演題目:A necessary condition for constituent knots of reducible genus two handlebody-knots 

アブストラクト:A knot K is a constituent knot of a genus two handlebody-knot H if there is a non-separating disk D in H such that the core of cl(H-N(D)) is K.
We characterize constituent knots of a non-trivial reducible genus two handlebody-knot in terms of an incompressible torus (or two incompressible tori) in the exterior of the handlebody-knot.