Search Results for author: Jacek Gondzio

Found 4 papers, 0 papers with code

Sparse Approximations with Interior Point Methods

no code implementations26 Feb 2021 Valentina De Simone, Daniela di Serafino, Jacek Gondzio, Spyridon Pougkakiotis, Marco Viola

Large-scale optimization problems that seek sparse solutions have become ubiquitous.

Portfolio Optimization Optimization and Control Numerical Analysis Numerical Analysis 65K05, 90C51, 90C25, 65F10, 65F08, 90C90

Optimising portfolio diversification and dimensionality

no code implementations3 Jun 2019 Mathias Barkhagen, Brian Fleming, Sergio Garcia Quiles, Jacek Gondzio, Joerg Kalcsics, Jens Kroeske, Sotirios Sabanis, Arne Staal

It is based on a novel concept called portfolio dimensionality that connects diversification to the non-Gaussianity of portfolio returns and can typically be defined in terms of the ratio of risk measures which are homogenous functions of equal degree.

Large-scale optimization with the primal-dual column generation method

no code implementations9 Sep 2013 Jacek Gondzio, Pablo González-Brevis, Pedro Munari

As recently presented in the literature, reductions in the number of calls to the oracle and in the CPU times are typically observed when compared to the standard column generation, which relies on extreme optimal dual solutions.

Decision Making Decision Making Under Uncertainty

Inexact Coordinate Descent: Complexity and Preconditioning

no code implementations19 Apr 2013 Rachael Tappenden, Peter Richtárik, Jacek Gondzio

In this paper we consider the problem of minimizing a convex function using a randomized block coordinate descent method.

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