Si vous avez apporté des modifications à Pure, elles seront bientôt visibles.

Résultat de recherche 1977 2018

Filtre
Article de travail
2018

A note on solving nonlinear optimization problems in variable precision

Gratton, S. & Toint, P., 11 déc. 2018, Arxiv, 11 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Function evaluation
Energy dissipation
Costs
Experiments

Deterministic and stochastic inexact regularization algorithms for nonconvex optimization with optimal complexity

Bellavia, S., Gurioli, G., Morini, B. & Toint, P., 12 nov. 2018, Arxiv, 32 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Nonconvex Optimization
Regularization
Derivatives
Derivative
Evaluation

Minimizing convex quadratics with variable precision Krylov methods

Gratton, S., Simon, E. & Toint, P., 2018, (Soumis) Arxiv, 26 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Krylov Methods
Quadratic Optimization
Cross product
Matrix Product
Conjugate Gradient

Sharp worst-case evaluation complexity bounds for arbitrary-order nonconvex optimization with inexpensive constraints

Cartis, C., Gould, N. I. M. & Toint, P., 3 nov. 2018, Arxiv, 30 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Derivatives
Costs
2017

A note on using performance and data profiles for training algorithms

Porcelli, M. & Toint, P., 26 nov. 2017, (Soumis) Arxiv, 8 p. (naXys technical report).

Résultats de recherche: Papier de travailArticle de travail

!!File
Training Algorithm
Benchmarking
Derivatives
Derivative
Profile

Improved second-order evaluation complexity for unconstrained nonlinear optimization using high-order regularized models

Cartis, C., Gould, N. I. M. & Toint, P., août 2017, Arxiv.

Résultats de recherche: Papier de travailArticle de travail

!!File
Function evaluation
Unconstrained Optimization
Adaptive algorithms
Nonlinear Optimization
Tensors

On the use of the saddle formulation in weakly-constrained 4D-VAR data assimilation

Gratton, S., Gürol, S., Simon, E. & Toint, P., 20 sept. 2017, (Soumis) Arxiv.

Résultats de recherche: Papier de travailArticle de travail

!!File
Data Assimilation
Saddle
Parallel processing systems
data assimilation
parallel computing

Partially separable convexly-constrained optimization with non-Lipschitzian singularities and its complexity

Chen, X., Toint, P. & Wang, H., 24 avr. 2017, Arxiv.

Résultats de recherche: Papier de travailArticle de travail

!!File
Constrained optimization
Constrained Optimization
Singularity
Objective function
Bound Constraints

Worst-case evaluation complexity and optimality of second-order methods for nonconvex smooth optimization

Cartis, C., Gould, N. I. M. & Toint, P., 22 sept. 2017, Arxiv, 35 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Newton-Raphson method
Optimality
Optimization
Function evaluation
Evaluation
2015

Evaluation complexity bounds for smooth constrained nonlinear optimization using scaled KKT conditions and high-order models

Cartis, C., Gould, N. I. M. & Toint, P., 17 oct. 2015, (Soumis) Namur center for complex systems, 20 p. (naXys technical report).

Résultats de recherche: Papier de travailArticle de travail

!!File
KKT Conditions
Constrained Optimization
Nonlinear Optimization
Higher Order
Derivatives

Improved worst-case evaluation complexity for potentially rank-deficient nonlinear least-Euclidean-norm problems using higher-order regularized models

Cartis, C., Gould, N. I. M. & Toint, P., 18 nov. 2015, 18 p. (naXys technical report).

Résultats de recherche: Papier de travailArticle de travail

!!File
Euclidean norm
Local Minimizer
Vector-valued Functions
Taylor series
Criticality

Worst-case evaluation complexity for unconstrained nonlinear optimization using high-order regularized models

Birgin, E., Gardenghi, J., Martinez, J-M., Santos, S. A. & Toint, P., juin 2015, 2015: Namur center for complex systems, 8 p. (naXys Technical Reports; Vol 05-2015).

Résultats de recherche: Papier de travailArticle de travail

!!File
Unconstrained Optimization
Nonlinear Optimization
Higher Order
Derivatives
Derivative
2014

An Interior-Point Trust-Funnel Algorithm for Nonlinear Optimization using a Squared-Violation Feasibility Measure

Curtis, F., Gould, N. I. M., Robinson, D. & Toint, P., 2 janv. 2014, Rutherford Appleton Laboratory, 43 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Interior Point
Nonlinear Optimization
Matrix Derivative
Merit Function
Quadratic Optimization
2013

Adaptive Observations And Multilevel Optimization In Data Assimilation

Gratton, S., Rincon-Camacho, M. & Toint, P., 2013, Namur: Namur center for complex systems, 18 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
data assimilation
decomposition
wave equation
weather
prediction

An example of slow convergence for Newton's method on a function with globally Lipschitz continuous Hessian

Cartis, C., Gould, N. I. M. & Toint, P., 5 mai 2013, Namur center for complex systems, 9 p.

Résultats de recherche: Papier de travailArticle de travail

!!File
Unconstrained Minimization
Steepest Descent Method
Evaluation Function
Terminate
Iterate