The height of two-dimensional cohomology classes of complex flag manifolds
For a parabolic subgroup H of the general linear group G = Gl(n, C), we characterize the Kàhler classes of G/H and give a formula for the height of any two-dimensional cohomology class. As an application, we classify the automorphisms of the cohomology ring of G/H when this ring is generated by two-dimensional classes.
Canadian Bull. Math. 26 (4) (1983), 498-502.