Octonionic Calabi-Yau theorem

Abstract

A new class of Riemannian metrics, called octonionic Kähler, is introduced and studied on a certain class of 16-dimensional manifolds. It is an octonionic analogue of Kähler metrics on complex manifolds and of HKT-metrics of hypercomplex manifolds. Then for this class of metrics an octonionic version of the Monge-Ampère equation is introduced and solved under appropriate assumptions. The latter result is an octonionic version of the Calabi-Yau theorem from Kähler geometry.

80 pages; revised version