Search Results for author: Leonardo Cotta

Found 5 papers, 1 papers with code

Causal Lifting and Link Prediction

no code implementations2 Feb 2023 Leonardo Cotta, Beatrice Bevilacqua, Nesreen Ahmed, Bruno Ribeiro

Existing causal models for link prediction assume an underlying set of inherent node factors -- an innate characteristic defined at the node's birth -- that governs the causal evolution of links in the graph.

Knowledge Base Completion Link Prediction

Reconstruction for Powerful Graph Representations

no code implementations NeurIPS 2021 Leonardo Cotta, Christopher Morris, Bruno Ribeiro

Empirically, we show how reconstruction can boost GNN's expressive power -- while maintaining its invariance to permutations of the vertices -- by solving seven graph property tasks not solvable by the original GNN.

Graph Reconstruction Graph Representation Learning +1

Unsupervised Joint k-node Graph Representations with Compositional Energy-Based Models

no code implementations NeurIPS 2020 Leonardo Cotta, Carlos H. C. Teixeira, Ananthram Swami, Bruno Ribeiro

Existing Graph Neural Network (GNN) methods that learn inductive unsupervised graph representations focus on learning node and edge representations by predicting observed edges in the graph.

Node Classification

Unsupervised Joint $k$-node Graph Representations with Compositional Energy-Based Models

no code implementations8 Oct 2020 Leonardo Cotta, Carlos H. C. Teixeira, Ananthram Swami, Bruno Ribeiro

Existing Graph Neural Network (GNN) methods that learn inductive unsupervised graph representations focus on learning node and edge representations by predicting observed edges in the graph.

Node Classification

Graph Pattern Mining and Learning through User-defined Relations (Extended Version)

1 code implementation14 Sep 2018 Carlos H. C. Teixeira, Leonardo Cotta, Bruno Ribeiro, Wagner Meira Jr

In this work we propose R-GPM, a parallel computing framework for graph pattern mining (GPM) through a user-defined subgraph relation.

Stochastic Optimization

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