Enhanced graph-learning schemes driven by similar distributions of motifs

S Rey, TM Roddenberry, S Segarra… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
This paper looks at the task of network topology inference, where the goal is to learn an
unknown graph from nodal observations. One of the novelties of the approach put forth is the …

Joint network topology inference in the presence of hidden nodes

M Navarro, S Rey, A Buciulea… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
We investigate the increasingly prominent task of jointly inferring multiple networks from
nodal observations. While most joint inference methods assume that observations are …

Robust graph filter identification and graph denoising from signal observations

S Rey, VM Tenorio, AG Marques - IEEE Transactions on Signal …, 2023 - ieeexplore.ieee.org
When facing graph signal processing tasks, it is typically assumed that the graph describing
the support of the signals is known. However, in many relevant applications the available …

Polynomial Graphical Lasso: Learning Edges from Gaussian Graph-Stationary Signals

A Buciulea, J Ying, AG Marques… - arXiv preprint arXiv …, 2024 - arxiv.org
This paper introduces Polynomial Graphical Lasso (PGL), a new approach to learning graph
structures from nodal signals. Our key contribution lies in modeling the signals as Gaussian …

Online Network Inference from Graph-Stationary Signals with Hidden Nodes

A Buciulea, M Navarro, S Rey, S Segarra… - arXiv preprint arXiv …, 2024 - arxiv.org
Graph learning is the fundamental task of estimating unknown graph connectivity from
available data. Typical approaches assume that not only is all information available …

Mitigating Subpopulation Bias for Fair Network Topology Inference

M Navarro, S Rey, A Buciulea, AG Marques… - arXiv preprint arXiv …, 2024 - arxiv.org
We consider fair network topology inference from nodal observations. Real-world networks
often exhibit biased connections based on sensitive nodal attributes. Hence, different …

Joint graph learning from Gaussian observations in the presence of hidden nodes

S Rey, M Navarro, A Buciulea… - 2022 56th Asilomar …, 2022 - ieeexplore.ieee.org
Graph learning problems are typically approached by focusing on learning the topology of a
single graph when signals from all nodes are available. However, many contemporary …

Joint inference of multiple graphs with hidden variables from stationary graph signals

S Rey, A Buciulea, M Navarro… - ICASSP 2022-2022 …, 2022 - ieeexplore.ieee.org
Learning graphs from sets of nodal observations represents a prominent problem formally
known as graph topology inference. However, current approaches are limited by typically …

Learning graphs and simplicial complexes from data

A Buciulea, E Isufi, G Leus… - ICASSP 2024-2024 IEEE …, 2024 - ieeexplore.ieee.org
Graphs are widely used to represent complex information and signal domains with irregular
support. Typically, the underlying graph topology is unknown and must be estimated from …

Central nodes detection from partially observed graph signals

Y He, HT Wai - … 2023-2023 IEEE International Conference on …, 2023 - ieeexplore.ieee.org
This paper focuses on detecting the central nodes in a graph from partially observed graph
signals with unknown graph topology. We follow a general model which considers observed …