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We investigate the construction of real analytic Levi-flat hypersurfaces in K3 surfaces. By taking images of real hyperplanes, one can construct such hypersurfaces in two-dimensional complex tori. We show that almost every K3 surfaces contains infinitely many Levi-flat hypersurfaces of this type. The proof relies mainly on a recent construction of Koike and Uehara, ideas of Verbitsky on ergodic complex structures, as well as an argument due to Ghys in the context of the study of the topology of generic leaves. -- On sinteresse `a la construction dhypersurfaces Levi-plates analytiques relles dans les surfaces K3. On peut en construire dans les tores complexes de dimension 2 en prenant des images dhyperplans reels. On montre que presque toute surface K3 contient une infinite dhypersurfaces Levi-plates de ce type. La preuve repose principalement sur une construction recente due `a Koike-Uehara, ainsi que sur les idees de Verbitsky sur les structures complexes ergodiques et une adaptation dun argument d^u `a Ghys dans le cadre de letude de la topologie des feuilles generiques.
We introduce a new geometrical invariant of CR manifolds of hypersurface type, which we dub the Levi core of the manifold. When the manifold is the boundary of a smooth bounded pseudoconvex domain, we show how the Levi core is related to two other im
We construct a canonical basis of two-cycles, on a $K3$ surface, in which the intersection form takes the canonical form $2E_8(-1) oplus 3H$. The basic elements are realized by formal sums of smooth submanifolds.
Let (M,J,w) be a manifold with an almost complex structure J tamed by a symplectic form w. We suppose that M has complex dimension two, is Levi convex and has bounded geometry. We prove that a real two-sphere with two elliptic points, embedded into t
A complex manifold $X$ is emph{weakly complete} if it admits a continuous plurisubharmonic exhaustion function $phi$. The minimal kernels $Sigma_X^k, k in [0,infty]$ (the loci where are all $mathcal{C}^k$ plurisubharmonic exhaustion functions fail to
Applying Lies theory, we show that any $mathcal{C}^omega$ hypersurface $M^5 subset mathbb{C}^3$ in the class $mathfrak{C}_{2,1}$ carries Cartan-Moser chains of orders $1$ and $2$. Integrating and straightening any order $2$ chain at any point $p in