Min-Chun Hong

University of Queensland (Australia)

Stability of bi-harmonic maps into spheres

In this talk, we show that the equator map is a minimiser of the Hessian energy H(u) = ∫ Ω|∇u|2 dx in H2(Ω;Sn) for n ≥ 10 and is unstable for 5 ≤ n ≤ 9.