arXiv Machine Learning

Learning Random Geometric Graphs Drawn in Probabilistic Metric Spaces

The paper introduces a data‑driven method for learning Random Geometric Graphs (RGGs) in probabilistic metric spaces. It defines a distance function based on the cumulative distribution of a disparity variable that captures differences in vertex connectivity and correlation of attached random variables, enabling edges to exist with a specified probability. The approach includes a rejection‑sampling technique for edge probability estimation and a closed‑form posterior for learning the inter‑observable correlation matrix, and it is demonstrated on highly multivariate real datasets.

arXiv Machine Learning
Jun 11

Weighted Random Dot Product Graphs

arXiv:2505. 03649v4 Announce Type: replace-cross Abstract: Modeling of intricate relational patterns has become a cornerstone of contemporary statistical research and related data science fields.

By Bernardo Marenco, Paola Bermolen, Marcelo Fiori, Federico Larroca, Gonzalo Mateos
arXiv Machine Learning
Sep 18

Learning Submanifolds for Subsequent Inference on Random Dot Product Graphs, Part 1: Theory

The paper introduces a framework for restricted inference on random dot product graphs whose latent positions lie on an unknown low‑dimensional support manifold. It proposes semisupervised decision rules that employ Isomap manifold learning to build a low‑dimensional Euclidean representation of the observed graph, and then apply an isometrically invariant function to map point configurations to actions. The authors analyze how the risk of these rules converges to that of an oracle rule as the amount of auxiliary data sampled from the manifold increases.

By Michael W. Trosset, Carey E. Priebe
arXiv Machine Learning
5d ago

Moment-guided edge sampling

The paper introduces a moment-guided edge sampling framework that quantifies how local edge edits affect global graph structure using spectral moments of the random-walk transition matrix. Two complementary methods— a combinatorial closed‑form update for low‑order moments and a low‑rank approach exploiting locality and cyclic trace invariance— enable efficient computation of moment changes for single or batched edits. These moment changes serve as interpretable structural signatures, and preserving them is shown to retain key graph properties such as triangle‑weighted clustering, while also improving performance in supervised node classification and graph contrastive learning.

By Weibin Cai, Reza Zafarani
arXiv Machine Learning
Jun 10

$k$-Nearest Neighbors in Gromov--Wasserstein Space

arXiv:2606. 10295v1 Announce Type: cross Abstract: The Gromov--Wasserstein (GW) distance provides a framework for comparing metric measure spaces, regardless of their underlying structure or geometry.

By Kaitlyn Hohmeier, Nicolas Fraiman, Caroline Moosmueller