Results 71 to 80 of about 197 (157)

A Joint production-inventory model for stock and price dependent consumption rate with production interruptions

open access: yes
Production control plays a crucial role in economic development of an industry. In practice, it has been perceived that production rate of a manufacturing industry is often interrupted, so we developed the production inventory of deteriorating item ...
Narayan Prasad   +2 more
core   +1 more source

CALCULATING THE MAXIMUM MODULUS OF A POLYNOMIAL USING STEČKIN’S LEMMA

open access: yes, 2008
. An algorithm for the calculation of the maximum modulus of a complex polynomial on the unit disc is described and evaluated. The algorithm is based on a lemma of Stečkin. Key words. Maximum modulus, polynomial, Stečkin’s lemma, von Neumann’s inequality,
J. J. Green
core  

Versions of Ekeland’s variational principle involving set perturbations

open access: yes
We consider Ekeland’s variational principle for multivalued maps. Instead of dealing with directional perturbations in a direction of the positive cone of the image space, we perturb the map under question by a convex subset of the positive cone to get ...
Dinh Quy, Phan Khanh
core   +1 more source

Case of Non-paramonotone Operators ∗

open access: yes, 2008
For variational inequalities characterizing saddle points of Lagragians associated with convex programming problems in Hilbert spaces, the convergence of an interior proximal method based on Bregman distance functionals is studied.
Variational Inequalities   +2 more
core  

Variational inequalities and the pricing of American options

open access: yes, 1989
This paper is devoted to the derivation of some regularity properties of pricing functions for American options and to the discussion of numerical methods, based on the Bensoussan-Lions methods of variational inequalities.
Bernard Lapeyre   +5 more
core   +1 more source

The efficient computation of sparse Jacobian matrices using automatic differentiation [PDF]

open access: yes, 1995
This paper is concerned with the efficient computation of sparse Jacobian matrices of nonlinear vector maps using automatic differentiation (AD). Specifically, we propose the use of a graph coloring technique, bi-coloring, to exploit the sparsity of the ...
Thomas Coleman   +3 more
core  

Solving Two-stage Quadratic Multiobjective Problems via Optimality and Relaxations [PDF]

open access: yes
Mathematics Subject Classification: 49K99; 65K10; 90C29; 90C46.This paper focuses on the study of robust two-stage quadratic multiobjective optimization problems.
Eberhard, A   +4 more
core   +1 more source

Truncated Newton Methods For Optimization With Inaccurate Functions And Gradients

open access: yes, 1999
. We consider unconstrained minimization problems that have functions and gradients given by "black box" codes with error control. We discuss several modifications of the Steihaug truncated Newton method that can improve performance for such ...
E.W. Sachs, C. T. Kelley, E. W. Sachs
core  

A class of gradient unconstrained minimization algorithms with adaptive stepsize

open access: yes, 2000
In this paper the development, convergence theory and numerical testing of a class of gradient unconstrained minimization algorithms with adaptive stepsize are presented.
Lambrinos, JN   +3 more
core   +1 more source

Superlinear Convergence And Implicit Filtering

open access: yes, 1999
. In this note we show how the implicit filtering algorithm can be coupled with the BFGS quasi-Newton update to obtain a superlinearly convergent iteration if the noise in the objective function decays sufficiently rapidly as the optimal point is ...
Choi Kelley, T. D. Choi, C. T. Kelley
core  

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