... components of the opensetP = {det(α) > 0} of hermitian forms of positive determinant (the othercomponents, of course, are the sets of forms of signature (p, q), p + q = n, withq even).One of the ... wish to investigate the behaviour of the K¨ahler conesKt of the variousfibres Xt= π−1(t), as t runs over S. Because of the assumption of localtriviality of π, the topology of Xtis locally ... ωp−1≥ 0. NUMERICAL CHARACTERIZATION OF THE K¨AHLER CONE1249In other words, the dual of the nef coneK is the closed convex cone generatedby cohomology classes of currents of the form [Y...