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DTSTAMP:20200908T190000Z
UID:1598880241670@events.msu.edu
CATEGORIES:Conferences / Seminars / Lectures
DTSTART:20200908T190000Z
DTEND:20200908T200000Z
SUMMARY:Math Seminar Series
DESCRIPTION:
 Geometry and Topology\n
 \n
 Yi Ni from Caltech, will 
 be speaking on the topic of Thurston norm 
 minimizing Seifert surfaces.\n
 \n
 Place: Online 
 (virtual meeting)\n
 Let K be a null-homologous 
 knot in a closed 3-manifold Y, and F be a 
 Seifert surface. One can cap off the boundary 
 of F with a disk in the zero surgery on K to 
 get a closed surface F_0. If we know that F 
 is Thurston norm minimizing, we can ask whether 
 F_0 is also Thurston norm minimizing. A classical 
 theorem of Gabai says that the answer 
 is Yes when Y is the 3-sphere. Gabai's theorem 
 can be generalized to many other 3-manifolds 
 using Heegaard Floer homology. In this talk, 
 we will discuss a sufficient condition for 
 F_0 to be Thurston norm minimizing which relates 
 this property to the 4-genus of the knot.\n\n
 Price: free\n
 Sponsor: Department of Mathematics\n
 Sponsor's Homepage: https://www.math.msu.edu/\n
 Contact name: Department of Mathematics\n
 Contact phone: (517) 353-0844\n
 for more info visit the web at:\n 
 https://www.math.msu.edu/Seminars/CalendarView.aspx?month-of=September2016\n
LOCATION:Go to Seminars Page for Zoom link and password
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