نتایج جستجو برای: fuzzy subgradient

تعداد نتایج: 90857  

2015
J. T. Leverenz H. Lee M. M. Wiecek

In this paper we develop a subgradient optimization methodology for convex multiparametric nonlinear programs. We define a parametric subgradient, extend some classical optimization results to the multiparametric case, and design a subgradient algorithm that is shown to converge under traditional conditions. We use this algorithm to solve two illustrative example problems and demonstrate its ac...

Journal: :SIAM Journal on Optimization 2015
Heinz H. Bauschke Caifang Wang Xianfu Wang Jia Xu

The subgradient projector is of considerable importance in convex optimization because it plays the key role in Polyak’s seminal work — and the many papers it spawned — on subgradient projection algorithms for solving convex feasibility problems. In this paper, we offer a systematic study of the subgradient projector. Fundamental properties such as continuity, nonexpansiveness, and monotonicity...

2010
G. Svindland

We introduce a generalised subgradient for law-invariant closed convex risk measures on L and establish its relationship with optimal risk allocations and equilibria. Our main result gives sufficient conditions ensuring a non-empty generalised subgradient.

Journal: :SIAM Journal on Optimization 2015

1999
X. Zhao P. B. Luh J. Wang D. D. Yao Yu-Chi Ho

The subgradient method is used frequently to optimize dual functions in Lagrangian relaxation for separable integer programming problems. In the method, all subproblems must be solved optimally to obtain a subgradient direction. In this paper, the surrogate subgradient method is developed, where a proper direction can be obtained without solving optimally all the subproblems. In fact, only an a...

2010
G. Svindland

We introduce a generalised subgradient for law-invariant closed convex risk measures on L and establish its relationship with optimal risk allocations and equilibria. Our main result gives sufficient conditions ensuring a non-empty generalised subgradient.

Journal: :Mathematical Programming 2010

Journal: :SIAM Journal on Optimization 2018

2008
Milagros Loreto Alejandro Crema

A study of the convergence properties of spectral projected subgradient method is presented and the convergence is shown. The convergence is based on spectral projected gradient approach. Some updates of the spectral projected subgradient are described.

Journal: :Journal of Approximation Theory 1984

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