Results 71 to 80 of about 5,063,462 (161)

La géometrie du lieu flex d'une hypersurface [PDF]

open access: yes, 2020
International audienceWe give a formula in terms of multidimensional resultants for an equation for the flex locus of a projective hypersurface, generalizing a classical result of Salmon for surfaces in P3. Using this formula, we compute the dimension of
Weimann, Martin   +5 more
core   +1 more source

Centro-affine hypersurface immersions with parallel cubic form

open access: yes, 2014
International audienceWe consider non-degenerate centro-affine hypersurface immersions in R^n whose cubic form is parallel with respect to the Levi-Civita connection of the affine metric.
Roland Hildebrand, Hildebrand, Roland
core   +1 more source

On the nature of time

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1990
We study how the notion of time can affect the motion of particles within the No Integrability Aesthetic Field Theory. We show that the Minkowski hypothesis of treating x4 as pure imaginary as well as the fourth component of vectors as pure imaginary ...
M. Muraskin
doaj   +1 more source

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

On the behavior of strictly plurisubharmonic functions near real hypersurfaces [PDF]

open access: yes, 2018
We describe the behavior of certain strictly plurisubharmonic functions near some real hypersurfaces in ℂ n , n≥3. Given a hypersurface we study continuous plurisubharmonic functions which are zero on the hypersurface and have Monge-Ampère mass greater ...
Ivarsson, Björn
core  

Holomorphic extension of meromorphic mappings along real analytic hypersurfaces

open access: yes, 2020
Let M subset of C-n be a real analytic hypersurface, M' subset of C-N (N >= n) be a strongly pseudoconvex real algebraic hypersurface of the special form, and F be a meromorphic mapping in a neighborhood of a point p is an element of M which is ...
Yazıcı, Özcan
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  

Lê cycles and hypersurface singularities

open access: yes, 1995
This book describes and gives applications of an important new tool in the study of complex analytic hypersurface singularities: the Lê cycles of the hypersurface.
Massey, David B
core   +1 more source

On the Work of Cartan and Münzner on Isoparametric Hypersurfaces

open access: yesAxioms
A hypersurface Mn in a real space form Rn+1, Sn+1, or Hn+1 is isoparametric if it has constant principal curvatures. This paper is a survey of the fundamental work of Cartan and Münzner on the theory of isoparametric hypersurfaces in real space forms, in
Thomas E. Cecil, Patrick J. Ryan
doaj   +1 more source

Existence and multiplicity of solutions to elliptic problems with discontinuities and free boundary conditions

open access: yesElectronic Journal of Differential Equations, 2010
We study the nonlinear elliptic problem with discontinuous nonlinearity $$displaylines{ -Delta u = f(u)H(u-mu ) quadhbox{in } Omega, cr u =h quad hbox{on }partial Omega, }$$ where $H$ is the Heaviside unit function, $f,h$ are given functions and ...
Sabri Bensid, Sidi Mohammed Bouguima
doaj  

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