Search Results for author: Kevin Bello

Found 14 papers, 3 papers with code

Discovering Dynamic Effective Connectome of Brain with Bayesian Dynamic DAG Learning

no code implementations7 Sep 2023 Abdolmahdi Bagheri, Mohammad Pasande, Kevin Bello, Babak Nadjar Araabi, Alireza Akhondi-Asl

However, learning DEC through these methods still faces two main challenges: one with the fundamental impotence of high-dimensional dynamic DAG discovery methods and the other with the low quality of fMRI data.

Causal Discovery

iSCAN: Identifying Causal Mechanism Shifts among Nonlinear Additive Noise Models

1 code implementation NeurIPS 2023 Tianyu Chen, Kevin Bello, Bryon Aragam, Pradeep Ravikumar

Structural causal models (SCMs) are widely used in various disciplines to represent causal relationships among variables in complex systems.

Optimizing NOTEARS Objectives via Topological Swaps

1 code implementation26 May 2023 Chang Deng, Kevin Bello, Bryon Aragam, Pradeep Ravikumar

In this work, we delve into the optimization challenges associated with this class of non-convex programs.

DAGMA: Learning DAGs via M-matrices and a Log-Determinant Acyclicity Characterization

3 code implementations16 Sep 2022 Kevin Bello, Bryon Aragam, Pradeep Ravikumar

From the optimization side, we drop the typically used augmented Lagrangian scheme and propose DAGMA ($\textit{DAGs via M-matrices for Acyclicity}$), a method that resembles the central path for barrier methods.

Causal Discovery

A Thorough View of Exact Inference in Graphs from the Degree-4 Sum-of-Squares Hierarchy

no code implementations16 Feb 2021 Kevin Bello, Chuyang Ke, Jean Honorio

Performing inference in graphs is a common task within several machine learning problems, e. g., image segmentation, community detection, among others.

Combinatorial Optimization Community Detection +2

A Le Cam Type Bound for Adversarial Learning and Applications

no code implementations1 Jul 2020 QiuLing Xu, Kevin Bello, Jean Honorio

Robustness of machine learning methods is essential for modern practical applications.

Vocal Bursts Type Prediction

Fairness constraints can help exact inference in structured prediction

no code implementations NeurIPS 2020 Kevin Bello, Jean Honorio

Given a generative model with an undirected connected graph $G$ and true vector of binary labels, it has been previously shown that when $G$ has good expansion properties, such as complete graphs or $d$-regular expanders, one can exactly recover the true labels (with high probability and in polynomial time) from a single noisy observation of each edge and node.

Fairness Structured Prediction

Direct Learning with Guarantees of the Difference DAG Between Structural Equation Models

no code implementations28 Jun 2019 Asish Ghoshal, Kevin Bello, Jean Honorio

Discovering cause-effect relationships between variables from observational data is a fundamental challenge in many scientific disciplines.

Exact inference in structured prediction

no code implementations NeurIPS 2019 Kevin Bello, Jean Honorio

Our results show that exact recovery is possible and achievable in polynomial time for a large class of graphs.

Structured Prediction

Minimax bounds for structured prediction

no code implementations2 Jun 2019 Kevin Bello, Asish Ghoshal, Jean Honorio

Structured prediction can be considered as a generalization of many standard supervised learning tasks, and is usually thought as a simultaneous prediction of multiple labels.

Structured Prediction

Computationally and statistically efficient learning of causal Bayes nets using path queries

no code implementations NeurIPS 2018 Kevin Bello, Jean Honorio

In this paper we first propose a polynomial time algorithm for learning the exact correctly-oriented structure of the transitive reduction of any causal Bayesian network with high probability, by using interventional path queries.

Causal Discovery

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