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Twistor spaces and compact manifolds admitting both Kähler and non-Kähler structures (1711.07948v2)

Published 21 Nov 2017 in math.DG and math.AG

Abstract: In this expository paper we review some twistor techniques and recall the problem of finding compact differentiable manifolds that can carry both K\"ahler and non-K\"ahler complex structures. Such examples were constructed independently by M. Atiyah, A. Blanchard and E. Calabi in the $1950$'s. In the $1980$'s V. Tsanov gave an example of a simply connected manifold that admits both K\"ahler and non-K\"ahler complex structures - the twistor space of a $K3$ surface. Here we show that the quaternion twistor space of a hyperk\"ahler manifold has the same property.

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