On convexity of the regular set of conical Kahler-Einstein metrics

Abstract

In this note we prove convexity, in the sense of Colding-Naber, of the regular set of solutions to some complex Monge-Ampere equations with conical singularities along simple normal crossing divisors. In particular, any two points in the regular set can be joined by a smooth minimal geodesic lying entirely in the regular set. We show that as a result, the classical theorems of Myers and Bishop-Gromov extend almost verbatim to this singular setting.

proof of diameter bound added in section 2, modification of the approximation scheme of cone metrics for λ< 0 in section 2, results are unchanged

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