24 research outputs found
Transforms of currents by modifications and 1-convex manifolds
One aim of the paper is the study of the strict transform and the total
transform of a current T on X via a modification f. Let T be a current of order zero on X: The authors give conditions concerning the existence and the unicity of a strict transform of T.
Now, let T be a pluriharmonic (1, 1)-current of order zero on
X. For such currents, the authors get sufficient conditions on T
to admit a total transform, and prove that this transform is (always) unique. Finally, the main goal
of the paper is the following theorem: Let X be a 1-convex manifold of dimension n ≥ 3 and
f from X to Y its Remmert reduction, where Y is a Stein quasi-projective space. Let N be a
compactification of Y such that N is projective and Sing(N) = Sing(Y ). Let M be a smooth
compactification of X. If the map i from H2(X,R) to H2(M,R) induced by the inclusion is injective, then the following properties are equivalent: (a) X is Kähler. (b) X is embeddable.
(c) M is projective
Lyapunov exponents, bifurcation currents and laminations in bifurcation loci
Bifurcation loci in the moduli space of degree rational maps are shaped
by the hypersurfaces defined by the existence of a cycle of period and
multiplier 0 or . Using potential-theoretic arguments, we
establish two equidistribution properties for these hypersurfaces with respect
to the bifurcation current. To this purpose we first establish approximation
formulas for the Lyapunov function. In degree , this allows us to build
holomorphic motions and show that the bifurcation locus has a lamination
structure in the regions where an attracting basin of fixed period exists