Results 61 to 70 of about 5,752 (197)

Leaps and bounds towards scale separation

open access: yesJournal of High Energy Physics, 2021
In a broad class of gravity theories, the equations of motion for vacuum compactifications give a curvature bound on the Ricci tensor minus a multiple of the Hessian of the warping function.
G. Bruno De Luca, Alessandro Tomasiello
doaj   +1 more source

Uniqueness and Liouville type results for radial solutions of some classes of k-Hessian equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2022
We establish a uniqueness theorem and a Liouville type result for positive radial solutions of some classes of nonlinear autonomous equation with the $k$-Hessian operator. We also give some interesting qualitative properties of solutions.
Mohamed Ben Chrouda
doaj   +1 more source

Optimal solution error covariance in highly nonlinear problems of variational data assimilation

open access: yes, 2012
The problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem (see, e.g.[1]) to find the initial condition, boundary conditions or model parameters.
Le Dimet, F.X.   +11 more
core   +1 more source

The Hessian equation in quaternionic space

open access: yes, 2023
arXiv admin note: text overlap with arXiv:1901.07080 by other ...
Amal, Hichame   +2 more
openaire   +2 more sources

On the curvature estimates for Hessian equations [PDF]

open access: yesAmerican Journal of Mathematics, 2019
The curvature estimates of $k$ curvature equations for general right hand side is a longstanding problem. In this paper, we totally solve the $n-1$ case and we also discuss some applications for our estimate.
Ren, Changyu, Wang, Zhizhang
openaire   +2 more sources

Hessian approximation in multilevel nonlinear optimization [PDF]

open access: yes, 2010
This research concerns the algorithmic study of Hessian approximation in the context of multilevel nonlinear optimization problems. Methods using finite-difference approximations or secant equations are here considered.
Malmedy, Vincent
core  

Hessian equations on exterior domain

open access: yesJournal of Mathematical Analysis and Applications, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Cao, Xu, Bao, Jiguang
openaire   +2 more sources

Primal-dual interior point QP-free algorithm for nonlinear constrained optimization

open access: yesJournal of Inequalities and Applications, 2017
In this paper, a class of nonlinear constrained optimization problems with both inequality and equality constraints is discussed. Based on a simple and effective penalty parameter and the idea of primal-dual interior point methods, a QP-free algorithm ...
Jinbao Jian   +3 more
doaj   +1 more source

Removable Singularities of $m$-Hessian Equations

open access: yes, 2016
In this paper we give a new, less restrictive condition for removability of singular sets, $E$, of smooth solutions to the m-Hessian equation (and also for more general fully nonlinear elliptic equations) in $Ω\setminus E$, $Ω\subset \mathbb R^n$.
Car, Hülya, Pröpper, René
openaire   +3 more sources

The weak solutions to complex Hessian equations

open access: yes, 2023
In this paper, we shall study existence of weak solutions to complex Hessian equations.
Sun, Wei
core   +1 more source

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