Projective embedding of log Riemann surfaces and K-stability

Abstract

Given a smooth polarized Riemann surface (X, L) endowed with a hyperbolic metric $\ddot{I}‰$ with cusp singularities along a divisor D, we show the L^2 projective embedding of (X, D) defined by L^k is asymptotically almost balanced in a weighted sense. The proof depends on sufficiently precise understanding of the behavior of the Bergman kernel in three regions, with the most crucial one being the neck region around D. This is the first step towards understanding the algebro-geometric stability of extremal Kähler metrics with singularities.

22 pages, 3 pictures