In mathematics, the Suita conjecture is a conjecture related to the theory of the Riemann surface, the boundary behavior of conformal maps, the theory of Bergman kernel, and the theory of the L2 extension. The conjecture states the following:

Suita (1972): Let R be an Riemann surface, which admits a nontrivial Green function . Let be a local coordinate on a neighborhood of satisfying . Let be the Bergman kernel for holomorphic (1, 0) forms on R. We define , and . Let be the logarithmic capacity which is locally defined by on R. Then, the inequality holds on the every open Riemann surface R, and also, with equality, then or, R is conformally equivalent to the unit disc less a (possible) closed set of inner capacity zero.[1]

It was first proved by Błocki (2013) for the bounded plane domain and then completely in a more generalized version by Guan & Zhou (2015). Also, another proof of the Suita conjecture and some examples of its generalization to several complex variables (the multi (high) - dimensional Suita conjecture) were given in Błocki (2014a) and Błocki & Zwonek (2020). The multi (high) - dimensional Suita conjecture fails in non-pseudoconvex domains.[2] This conjecture was proved through the optimal estimation of the Ohsawa–Takegoshi L2 extension theorem.

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