Calabi flow on polarized K\"ahler surfaces
We study global smooth Calabi flows on polarized K\"ahler surfaces $(M,L)$, assuming uniformly bounded Sobolev constants and the algebraic conditions $\chi(\mathcal O_M)=1$ and $c_1(M)\cdot c_1(L)>0$. Using the orbifold compactness theorem, we prove a uniform Bergman estimate, construct a normal test configuration for...