UBC DG + MP + PDE Seminar: Joao Henrique Andrade

  • Date: 10/25/2022
  • Time: 15:30
Joao Henrique Andrade, UBC

University of British Columbia


Compactness within the space of complete, constant Q-curvature metrics on the sphere with isolated singularities


This talk addresses the moduli space of complete, conformally flat metrics metrics on a sphere with k punctures having constant positive Q-curvature and positive scalar curvature. Previous work has shown that such metrics admit an asymptotic expansion near each puncture, allowing one to define an asymptotic necksize of each singular point. We prove that any set in the moduli space such that the distances between distinct punctures and the asymptotic necksizes all remain bounded away from zero is sequentially compact, mirroring a theorem of D. Pollack about singular Yamabe metrics. Along the way, we define a radial Pohozaev invariant at each puncture and refine some a priori bounds of the conformal factor, which may be of independent interest.

Other Information: 

Location: ESB 4133 (PIMS Seminar Room/ Lounge)

Time: 3.30pm Pacific


More details can be found here.