Some Gravitational Instantons

Abstract

All known gravitational instantons with $Λ> 0$ ($S^4, CP^2, S^2 \times S^2$ and $CP # \overline{CP}^2$) are described. They are all special cases of the Taub-NUT-$Λ$ local solution. Hence they are Type D and are locally conformably Kähler. They all may be expressed in Bianchi IX form and have four or more Killing vectors.

This is a paper I presented at a conference in Moscow in December 1978, but it was never published