Einstein metrics extending Chen-Teo geometries with cosmological constant are either Plebański-Demiański or anti-self-dual Weyl cases, yielding for lambda<0 a conformal infinity between asymptotically hyperbolic ends, one conformal to an ALE scalar-flat Kähler metric, plus new instanton topologies a
Araneda,Hidden Symmetries of Generalised Gravitational Instantons, Annales Henri Poincare26(2025) no.11, 4021-4049 [arXiv:2309.05617 [gr-qc]]
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On Chen-Teo geometries with cosmological constant
Einstein metrics extending Chen-Teo geometries with cosmological constant are either Plebański-Demiański or anti-self-dual Weyl cases, yielding for lambda<0 a conformal infinity between asymptotically hyperbolic ends, one conformal to an ALE scalar-flat Kähler metric, plus new instanton topologies a