2 code implementations • 2 Mar 2023 • Jason J. Bramburger, Giovanni Fantuzzi
We present a flexible data-driven method for dynamical system analysis that does not require explicit model discovery.
no code implementations • 25 Jan 2021 • Mayur Lakshmi, Giovanni Fantuzzi, Sergei Chernyshenko, Davide Lasagna
We present a novel method to compute unstable periodic orbits (UPOs) that optimize the infinite-time average of a given quantity for polynomial ODE systems.
Dynamical Systems Optimization and Control Chaotic Dynamics
2 code implementations • 22 Jul 2020 • Yang Zheng, Giovanni Fantuzzi
Third, we prove that if $P$ is positive definite on a compact semialgebraic set $\mathcal{K}=\{x:g_1(x)\geq 0,\ldots, g_m(x)\geq 0\}$ satisfying the Archimedean condition, then $P(x) = S_0(x) + g_1(x)S_1(x) + \cdots + g_m(x)S_m(x)$ for matrices $S_i(x)$ that are sums of sparse SOS matrices.
Optimization and Control Data Structures and Algorithms Systems and Control Systems and Control Algebraic Geometry
2 code implementations • 14 Jul 2018 • Yang Zheng, Giovanni Fantuzzi, Antonis Papachristodoulou
Optimization over non-negative polynomials is fundamental for nonlinear systems analysis and control.
Optimization and Control Systems and Control
2 code implementations • 8 Apr 2018 • Yang Zheng, Giovanni Fantuzzi, Antonis Papachristodoulou
We show that a subset of sparse SOS matrices with chordal sparsity patterns can be equivalently decomposed into a sum of multiple SOS matrices that are nonzero only on a principal submatrix.
Optimization and Control Systems and Control
2 code implementations • 17 Jul 2017 • Yang Zheng, Giovanni Fantuzzi, Antonis Papachristodoulou, Paul Goulart, Andrew Wynn
We employ chordal decomposition to reformulate a large and sparse semidefinite program (SDP), either in primal or dual standard form, into an equivalent SDP with smaller positive semidefinite (PSD) constraints.
Optimization and Control
2 code implementations • 6 Nov 2016 • Yang Zheng, Giovanni Fantuzzi, Antonis Papachristodoulou, Paul Goulart, Andrew Wynn
We propose an efficient first-order method, based on the alternating direction method of multipliers (ADMM), to solve the homogeneous self-dual embedding problem for a primal-dual pair of semidefinite programs (SDPs) with chordal sparsity.
Optimization and Control
2 code implementations • 20 Sep 2016 • Yang Zheng, Giovanni Fantuzzi, Antonis Papachristodoulou, Paul Goulart, Andrew Wynn
We show that chordal decomposition can be applied to either the primal or the dual standard form of a sparse SDP, resulting in scaled versions of ADMM algorithms with the same computational cost.
Optimization and Control