Real frontiers of fake planes

If r = ∞, we would have a maximal affine immersion of H, whose boundary would project to a closed leaf containing p and there would be two saddle connections in the

Landsberg, Ranks of tensors and a generalization of secant vari- eties.. Linear

We show that every affine or projective algebraic variety defined over the field of real or complex numbers is homeomorphic to a variety defined over the field of algebraic numbers..

In this paper, using a different approach, we provide an explicit strongly pseu- doconvex hypersurface in C 2, that is not biholomorphically equivalent to any

required to above then the contours which fullfill (P) are the union of those components of A which meet the topological interior of R.. Baouendi-Treves theorem [1]

Drake constructs a finite projective Hjelmslev plane of level n (for arbitrary n) in which all point-neighbourhood-structures (which are affine Hjelmslev planes of

In order to prove existence and regularity results for non-variational problems, it is rather natural to approximate the « principal » coefficients of the operator with séquences

5) All differentiable manifolds of the same dimension belong to the same unoriented cobordism class. In case 72=4 the manifolds admit almost complex structures, all belonging to