no code implementations • 26 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
no code implementations • 3 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.
no code implementations • 9 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.
no code implementations • 19 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.