On nonformal simply-connected symplectic manifolds.
On nonisometric isospectral connected fractal domains.
A fundamental question raised by M. Kac in 1966 is: Must two isospectral planar domains necessarily be isometric? Following a long history of investigation C. Gordon, D. L. Webb and S. Wolpert in 1992 finally proved that the answer is no. By using the idea of transposition maps one can construct a wide class of planar domains with piecewise continuous boundaries which are isospectral but non-isometric. In this note we study the Kac question in relation to domains with fractal boundaries and by following...
On nonlinear connections in higher order Lagrange spaces.
On nonlinear equations integrable in theta-functions of nonprincipally polarized Abelian varieties.
On non-parallel -structures.
On nonparametric surfaces of constant mean curvature
On non-Uniqueness of Complex Geodesies in Convex Bounded Domains
Si studiano «combinazioni convesse complesse» per mappe olomorfe dal disco unità di in un dominio convesso limitato di uno spazio di Banach complesso , e se ne traggono conseguenze sul carattere globale della non unicità per le geodetiche complesse di .
On normal CR-submanifolds of S-manifolds
Many authors have studied the geometry of submanifolds of Kaehlerian and Sasakian manifolds. On the other hand, David E. Blair has initiated the study of S-manifolds, which reduce, in particular cases, to Sasakian manifolds ([1, 2]). I. Mihai ([8]) and L. Ornea ([9]) have investigated CR-submanifolds of S-manifolds. The purpose of the present paper is to study a special kind of such submanifolds, namely the normal CR-submanifolds. In Sections 1 and 2, we review basic formulas and definitions for...
On normal forms of Laplacian and its iterations in harmonic spaces
On normal homogeneous Einstein manifolds
On normal sections of Stiefel submanifold.
On normal sections of Veronese submanifold.
On normally flat Einstein submanifolds.
On null geodesic collineations in some Riemannian spaces
On one class of homogeneous compact Einstein manifolds.
On one family of minimal tori in with planar embedded ends.
On orthogonal conjugate nets in
On osculating spheres to rectifiable curves
On ovaloids in
On pairs of metrics invariant under a cocompact action of a group.