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Federico Lopez

3 accepted papers

2026

Relational Graph Transformer

ICLR 2026poster

Relational Deep Learning (RDL) is a promising approach for building state-of-the-art predictive models on multi-table relational data by representing it as a heterogeneous temporal graph. However, commonly used Graph Neural Network models suffer from fundamental limitations in capturing complex stru…

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2021

Symmetric Spaces for Graph Embeddings: A Finsler-Riemannian Approach

ICML 2021spotlight

Learning faithful graph representations as sets of vertex embeddings has become a fundamental intermediary step in a wide range of machine learning applications. We propose the systematic use of symmetric spaces in representation learning, a class encompassing many of the previously used embedding t…

2021

Vector-valued Distance and Gyrocalculus on the Space of Symmetric Positive Definite Matrices

NeurIPS 2021spotlight

We propose the use of the vector-valued distance to compute distances and extract geometric information from the manifold of symmetric positive definite matrices (SPD), and develop gyrovector calculus, constructing analogs of vector space operations in this curved space. We implement these operation…