
Papers  Hermitian and special structures on products of spheres 



This is my PhD thesis, discussed on 2001, April 27th, at
University of Pisa, Italy.
Abstract
In the first chapter I describe a family of locally conformal Kähler metrics
on class 1 Hopf surfaces, and study in details a 2dimensional foliation
arising from this family.
In the remaining chapters, I start from
a classical theorem of Kervaire stating that products of spheres are
parallelizable if and only if at least one of the factors has odd
dimension to give explicit parallelizations, and then use these parallelizations
to obtain Gstructures on S^{m}×S^{n},
where G=U(m+n)/2, Sp(m+n)/4, G_{2}, Spin(7), Spin(9).
In particular, it is shown that CalabiEckmann Hermitian structures
on products of two odddimensional spheres are invariant with respect to
these parallelizations.






