Results 11 to 20 of about 66,495 (292)

Symphonic map from ellipsoid to ellipsoid

open access: yes, 2023
In this paper, we proved the existence of Symphonic map from ellipsoid to ellipsoid. We also geive give Hopf construction of Symphonic map from ellipsoid to ellipsoid.
Cao, Xiangzhi
openaire   +3 more sources

Existence of Gauss John ellipsoid operator problem [PDF]

open access: yesITM Web of Conferences, 2022
There is a common example in convex geometry and Banach space geometry: the unique ellipsoid with the largest volume associated with each symmetric convex body K is called John ellipsoid.
Yu Li’ao, Zou Du
doaj   +2 more sources

Ellipsoid

open access: yes, 2011
surfaces, ellipsoidAn ellipsoid is a quadratic surface given by (x^2)/(a^2)+(y^2)/(b^2)+(z^2)/(c^2)=1Componente Curricular::Educação Superior::Ciências Exatas e da Terra ...
Bryant, Jeff
core   +4 more sources

Comparison of the ellipsoid and simplex methods

open access: yesLietuvos Matematikos Rinkinys, 1999
The ellipsoid method is presented. The least squers functional of the basic solution linear constrains is used as ellipsoid. The Klee-Minty linear programming problem is used to compare the ellipsoid and simplex methods.
Eligijus Laurinavičius   +1 more
doaj   +4 more sources

Patch area and uniform sampling on the surface of any ellipsoid [PDF]

open access: yes, 2023
Algorithms for generating uniform random points on a triaxial ellipsoid are non-trivial to verify because of the non-analytical form of the surface area.
Callum Robert Marples   +3 more
core   +1 more source

Ellipsoidal Collapse and Previrialization [PDF]

open access: yesThe Astronomical Journal, 2001
We study the non-linear evolution of a dust ellipsoid,embedded in a Friedmann flat background universe, in order to determine the evolution of the density of the ellipsoid as the perturbation to it related detaches from general expansion and begins to collapse.
Del Popolo, A, Ercan, EN, Xia, Z
openaire   +4 more sources

Normal Polytopes and Ellipsoids [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2021
We show that: (1) unimodular simplices in a lattice 3-polytope cover a neighborhood of the boundary of the polytope if and only if the polytope is very ample, (2) the convex hull of lattice points in every ellipsoid in $\mathbb{R}^3$ has a unimodular cover, and (3) for every $d\geqslant 5$, there are ellipsoids in $\mathbb{R}^d$, such that the convex ...
openaire   +4 more sources

On the Minimum Volume Covering Ellipsoid of Ellipsoids [PDF]

open access: yesSIAM Journal on Optimization, 2006
Let ${\cal S}$ denote the convex hull of $m$ full-dimensional ellipsoids in $\mathbb{R}^n$. Given $\epsilon > 0$ and $\delta > 0$, we study the problems of computing a $(1+ \epsilon)$-approximation to the minimum volume covering ellipsoid of ${\cal S}$ and a $(1 + \delta)n$-rounding of ${\cal S}$.
openaire   +4 more sources

DEM of ellipsoid, inverse ellipsoid and saddle

open access: yes, 2021
DEM of ellipsoid, inverse ellipsoid and ...
Li Zhenya (9345848)
core   +1 more source

The Neumann problem on ellipsoids [PDF]

open access: yesJournal of Applied Mathematics and Computing, 2017
The Neumann problem on an ellipsoid in R^n asks for a function harmonic inside the ellipsoid whose normal derivative is some specified function on the ellipsoid. We solve this problem when the specified function on the ellipsoid is a normalized polynomial (a polynomial divided by the norm of the normal vector arising from the definition of the ...
Sheldon Axler, Peter J. Shin
openaire   +3 more sources

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