Posted in
Speaker:
Cameron Gordon
Affiliation:
University of Texas at Austin
Date:
Thu, 15/05/2025 - 10:00 - 11:00
Location:
MPIM Lecture Hall
Parent event:
Conference on "Quantum Topology" We determine explicit integers g_1 and g_2 such that if g is at least g_1 (resp. g_2) then there is no algorithm to decide whether or not a closed, orientable, PL locally flat surface in S4 of genus g is PL (resp. TOP) unknotted. We also give analogous results for non-orientable surfaces, and for 2-spheres in connected sums of S 2 x S 2.
© MPI f. Mathematik, Bonn | Impressum & Datenschutz |