Search Results for author: Jakub Marecek

Found 34 papers, 10 papers with code

Fairness in Ranking: Robustness through Randomization without the Protected Attribute

1 code implementation28 Mar 2024 Andrii Kliachkin, Eleni Psaroudaki, Jakub Marecek, Dimitris Fotakis

Second, there are multiple measures of fairness of rankings, and optimization-based methods utilizing a single measure of fairness of rankings may produce rankings that are unfair with respect to other measures.

Attribute Fairness +1

Learning quantum Hamiltonians at any temperature in polynomial time with Chebyshev and bit complexity

no code implementations8 Feb 2024 Ales Wodecki, Jakub Marecek

We consider the problem of learning local quantum Hamiltonians given copies of their Gibbs state at a known inverse temperature, following Haah et al. [2108. 04842] and Bakshi et al. [arXiv:2310. 02243].

Generating Likely Counterfactuals Using Sum-Product Networks

no code implementations25 Jan 2024 Jiri Nemecek, Tomas Pevny, Jakub Marecek

We show that the search for the most likely explanations satisfying many common desiderata for counterfactual explanations can be modeled using mixed-integer optimization (MIO).

counterfactual Counterfactual Explanation

Piecewise Polynomial Regression of Tame Functions via Integer Programming

no code implementations22 Nov 2023 Gilles Bareilles, Johannes Aspman, Jiri Nemecek, Jakub Marecek

We consider approximating so-called tame functions, a class of nonsmooth, nonconvex functions, with piecewise polynomial functions.

regression

Joint Problems in Learning Multiple Dynamical Systems

no code implementations3 Nov 2023 Mengjia Niu, Xiaoyu He, Petr Ryšavý, Quan Zhou, Jakub Marecek

Clustering of time series is a well-studied problem, with applications ranging from quantitative, personalized models of metabolism obtained from metabolite concentrations to state discrimination in quantum information theory.

Clustering Time Series

Group-blind optimal transport to group parity and its constrained variants

1 code implementation17 Oct 2023 Quan Zhou, Jakub Marecek

Fairness holds a pivotal role in the realm of machine learning, particularly when it comes to addressing groups categorised by sensitive attributes, e. g., gender, race.

Attribute Fairness

Taming Binarized Neural Networks and Mixed-Integer Programs

no code implementations5 Oct 2023 Johannes Aspman, Georgios Korpas, Jakub Marecek

There has been a great deal of recent interest in binarized neural networks, especially because of their explainability.

Improving the Validity of Decision Trees as Explanations

1 code implementation11 Jun 2023 Jiri Nemecek, Tomas Pevny, Jakub Marecek

Here, we train a shallow tree with the objective of minimizing the maximum misclassification error across each leaf node.

valid

Fairness in Forecasting of Observations of Linear Dynamical Systems

1 code implementation12 Sep 2022 Quan Zhou, Jakub Marecek, Robert N. Shorten

We also show that by exploiting sparsity in the convexifications, we can reduce the run time of our methods considerably.

Fairness Time Series +1

Closed-Loop View of the Regulation of AI: Equal Impact across Repeated Interactions

no code implementations3 Sep 2022 Quan Zhou, Ramen Ghosh, Robert Shorten, Jakub Marecek

In a closed-loop view of the AI system and its users, the equal treatment concerns one pass through the loop.

Herd Routes: A Preventative IoT-Based System for Improving Female Pedestrian Safety on City Streets

no code implementations12 Jul 2022 Madeleine Woodburn, Wynita M. Griggs, Jakub Marecek, Robert N. Shorten

With positive results from the initial testing of the proof-of-concept, further development could significantly contribute towards creating safer pedestrian routes through cities, and tackle the societal change that is required to improve female pedestrian safety in the long term.

Stochastic Langevin Differential Inclusions with Applications to Machine Learning

no code implementations23 Jun 2022 Fabio V. Difonzo, Vyacheslav Kungurtsev, Jakub Marecek

In this paper, we show some foundational results regarding the flow and asymptotic properties of Langevin-type Stochastic Differential Inclusions under assumptions appropriate to the machine-learning settings.

BIG-bench Machine Learning

Recovering models of open quantum systems from data via polynomial optimization: Towards globally convergent quantum system identification

no code implementations31 Mar 2022 Denys I. Bondar, Zakhar Popovych, Kurt Jacobs, Georgios Korpas, Jakub Marecek

Current quantum devices suffer imperfections as a result of fabrication, as well as noise and dissipation as a result of coupling to their immediate environments.

Time Series Time Series Analysis

Randomized Algorithms for Monotone Submodular Function Maximization on the Integer Lattice

no code implementations19 Nov 2021 Alberto Schiabel, Vyacheslav Kungurtsev, Jakub Marecek

Optimization problems with set submodular objective functions have many real-world applications.

Predictability and Fairness in Load Aggregation and Operations of Virtual Power Plants

no code implementations6 Oct 2021 Jakub Marecek, Michal Roubalik, Ramen Ghosh, Robert N. Shorten, Fabian R. Wirth

We show that even considering the non-linearity of the alternating-current model, this notion of predictability and fairness can be guaranteed for incrementally input-to-state stable (iISS) controllers, under mild assumptions.

Fairness

Subgroup Fairness in Two-Sided Markets

1 code implementation4 Jun 2021 Quan Zhou, Jakub Marecek, Robert N. Shorten

In the process, we introduce a novel notion of subgroup fairness (which we call Inter-fairness), which can be combined with other notions of fairness within each subgroup (called Intra-fairness), and the utility for the customers (Customer-Care) in the objective of the market-clearing problem.

Fairness Vocal Bursts Valence Prediction

Trilevel and Multilevel Optimization using Monotone Operator Theory

no code implementations19 May 2021 Allahkaram Shafiei, Vyacheslav Kungurtsev, Jakub Marecek

We consider rather a general class of multi-level optimization problems, where a convex objective function is to be minimized subject to constraints of optimality of nested convex optimization problems.

A space-indexed formulation of packing boxes into a larger box

no code implementations2 Jan 2021 Sam D. Allen, Edmund K. Burke, Jakub Marecek

Current integer programming solvers fail to decide whether 12 unit cubes can be packed into a 1x1x11 box within an hour using the natural relaxation of Chen/Padberg.

Screening for an Infectious Disease as a Problem in Stochastic Control

no code implementations1 Nov 2020 Jakub Marecek

There has been much recent interest in screening populations for an infectious disease.

Thompson Sampling

Predictability and Fairness in Social Sensing

no code implementations31 Jul 2020 Ramen Ghosh, Jakub Marecek, Wynita M. Griggs, Matheus Souza, Robert N. Shorten

We consider the design of distributed algorithms that govern the manner in which agents contribute to a social sensing platform.

Fairness

Fairness in Forecasting and Learning Linear Dynamical Systems

no code implementations12 Jun 2020 Quan Zhou, Jakub Marecek, Robert N. Shorten

In machine learning, training data often capture the behaviour of multiple subgroups of some underlying human population.

Fairness Time Series +1

Learning of Linear Dynamical Systems as a Non-Commutative Polynomial Optimization Problem

1 code implementation4 Feb 2020 Quan Zhou, Jakub Marecek

There has been much recent progress in forecasting the next observation of a linear dynamical system (LDS), which is known as the improper learning, as well as in the estimation of its system matrices, which is known as the proper learning of LDS.

Deep Autoencoders with Value-at-Risk Thresholding for Unsupervised Anomaly Detection

no code implementations9 Dec 2019 Albert Akhriev, Jakub Marecek

Many real-world monitoring and surveillance applications require non-trivial anomaly detection to be run in the streaming model.

Incremental Learning Unsupervised Anomaly Detection

On-line Non-Convex Constrained Optimization

no code implementations16 Sep 2019 Olivier Massicot, Jakub Marecek

Time-varying non-convex continuous-valued non-linear constrained optimization is a fundamental problem.

A Fine-Grained Variant of the Hierarchy of Lasserre

no code implementations23 Jun 2019 Wann-Jiun Ma, Jakub Marecek, Martin Mevissen

There has been much recent interest in hierarchies of progressively stronger convexifications of polynomial optimisation problems (POP).

Using Deep Learning to Extend the Range of Air-Pollution Monitoring and Forecasting

1 code implementation22 Oct 2018 Philipp Haehnel, Jakub Marecek, Julien Monteil, Fearghal O'Donncha

Across numerous applications, forecasting relies on numerical solvers for partial differential equations (PDEs).

On-Line Learning of Linear Dynamical Systems: Exponential Forgetting in Kalman Filters

1 code implementation AAAI 2019 Mark Kozdoba, Jakub Marecek, Tigran Tchrakian, Shie Mannor

Based on this insight, we devise an on-line algorithm for improper learning of a linear dynamical system (LDS), which considers only a few most recent observations.

regression Time Series +1

Pursuit of Low-Rank Models of Time-Varying Matrices Robust to Sparse and Measurement Noise

1 code implementation10 Sep 2018 Albert Akhriev, Jakub Marecek, Andrea Simonetto

In tracking of time-varying low-rank models of time-varying matrices, we present a method robust to both uniformly-distributed measurement noise and arbitrarily-distributed ``sparse'' noise.

Robust Spectral Filtering and Anomaly Detection

no code implementations3 Aug 2018 Jakub Marecek, Tigran Tchrakian

We consider a setting, where the output of a linear dynamical system (LDS) is, with an unknown but fixed probability, replaced by noise.

Anomaly Detection

Resource Allocation with Population Dynamics

no code implementations12 Apr 2016 Jonathan Epperlein, Jakub Marecek

Many analyses of resource-allocation problems employ simplistic models of the population.

Pricing Vehicle Sharing with Proximity Information

no code implementations25 Jan 2016 Jakub Marecek, Robert Shorten, Jia Yuan Yu

For vehicle sharing schemes, where drop-off positions are not fixed, we propose a pricing scheme, where the price depends in part on the distance between where a vehicle is being dropped off and where the closest shared vehicle is parked.

Integer-Programming Ensemble of Temporal-Relations Classifiers

1 code implementation5 Dec 2014 Catherine Kerr, Terri Hoare, Paula Carroll, Jakub Marecek

The extraction and understanding of temporal events and their relations are major challenges in natural language processing.

Sentence

Matrix Completion under Interval Uncertainty

no code implementations11 Aug 2014 Jakub Marecek, Peter Richtarik, Martin Takac

Matrix completion under interval uncertainty can be cast as matrix completion with element-wise box constraints.

Collaborative Filtering Matrix Completion

r-Extreme Signalling for Congestion Control

no code implementations9 Apr 2014 Jakub Marecek, Robert Shorten, Jia Yuan Yu

A central authority has up-to-date knowledge of the congestion across all resources and uses randomisation to provide a scalar or an interval for each resource at each time.

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