On the completeness of some Bianchi type A and related K\"ahler-Einstein metrics.
2020
We prove the existence of complete cohomogeneity one triaxial K\"ahler-Einstein metrics in dimension four under an action of the Euclidean group $E(2)$. We also demonstrate local existence of Ricci flat K\"ahler metrics of a related type that are given via generalized PDEs, and are, under mild conditions, incomplete. The common framework for both metric types is a frame-dependent system of Lie bracket relations and generalized PDEs yielding a class of K\"ahler-Einstein metrics on $4$-manifolds which includes all diagonal Bianchi type A metrics.
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