# Constancy of Hodge numbers in a family of compact complex manifolds

Does there exist a family of compact complex manifolds over unit disk such that the Hodge numbers are not constant in the family?

The answer is manifestly positive in complex dimension 1.

It is known, I think, that if there a Kaehler fiber, then Hodge numbers must be constant in a small neighbourhood thereof.

Nakamura has constructed a family of compact complex threefolds such that the Hodge number $$h^{p,q}$$ is not deformation invariant for $$p+q>0$$. They are obtained by deforming an "Iwasawa manifold" $$\mathbb{C}^3/\Gamma$$. See Complex parallelisable manifolds and their small deformations, J. Diff. Geom. 10 (1975), 95-112.