Results 101 to 110 of about 5,383,504 (242)

Robust Control for Underactuated Fixed-Wing Unmanned Aerial Vehicles

open access: yesMathematics
Dynamic surface control (DSC) is a recognized nonlinear control approach for high-order systems. However, as the complexity of the system increases and the first-order filter (FOF) is introduced, there exists a singularity problem, i.e., the control ...
Tianyi Wang, Luxin Zhang, Zhihua Chen
doaj   +1 more source

Semi-parallel Hopf real hypersurfaces in the complex quadric

open access: yes, 2023
In this paper, we introduce the new notion of semi-parallel real hypersurface in the complex quadric (Q^{m}). Moreover, we give a nonexistence theorem for semi-parallel Hopf real hypersurfaces in the complex quadric (Q^{m}) for (m geq 3)
Young Jin Suh   +3 more
core   +2 more sources

Real hypersurfaces in CP² and CH² whose structure Jacobi operator is Lie D-parallel

open access: yes, 2012
In [3], [7] and [8] results concerning the parallelness of the Lie derivative of the structure Jacobi operator of a real hypersurface with respect to and to any vector field X were obtained in both complex projective space and complex hyperbolic space ...
Panagiotidou, K.   +3 more
core   +2 more sources

The Hamiltonian dynamics over real hypersurfaces in Kaehler manifolds

open access: yes, 2006
Let X be a Kaehler manifold with complex dimension n. Let ωX be its Kaehler form. Let M be a strongly pseudo convex real hypersurface in X. For this hypersurface, the deformation theory of CR structures is successfully developed. And we find that H1(M,T′)
Akahori, Takao
core   +1 more source

On real forms of Fermat hypersurfaces

open access: yes, 2023
In this paper, we compute the number of real forms of Fermat hypersurfaces for degree $d \ge 2$ except the degree 4 surface case, and give explicit descriptions of them.
openaire   +2 more sources

High-order Levi curvatures and classification results

open access: yes, 2014
In this paper we write some differential formulas involving the high-order Levi curvatures of a real hypersurface in a complex space form.
Martino, Vittorio   +2 more
core   +1 more source

On 1-Harmonic Functions

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2007
Characterizations of entire subsolutions for the 1-harmonic equation of a constant 1-tension field are given with applications in geometry via transformation group theory.
Shihshu Walter Wei
doaj  

Real hypersurfaces in Kähler manifolds [PDF]

open access: yesAsian Journal of Mathematics, 2001
This paper is concerned with the geometry of embedded real hypersurfaces in a Kähler manifold, where isomorphisms are both holomorphic and isometric in the underlying Riemannian structure. The author introduces their local invariants and compatibility relations, solves the local realization problem, and gives a characterization of the metric sphere in \
openaire   +2 more sources

The decay of the Ricci curvature at a real hypersurface singularity.

open access: yes, 2008
: The Ricci curvature at an isolated singularity of an immersed hypersurface exhibits a local behaviour echoing a global property of the Ricci curvature on a complete hypersurface in euclidean space (i.e., the Efimov theorem [12], that sup Ric ≥ 0). This
Brian Smyth
core  

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