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Unsupervised graph representation learning aims to learn low-dimensional node embeddings without supervision while preserving graph topological structures and node attributive features. Previous graph neural networks (GNN) require a large…

Machine Learning · Computer Science 2020-09-04 Yanqiao Zhu , Yichen Xu , Feng Yu , Shu Wu , Liang Wang

In recent years, continual learning (CL) techniques have made significant progress in learning from streaming data while preserving knowledge across sequential tasks, particularly in the realm of euclidean data. To foster fair evaluation…

Machine Learning · Computer Science 2024-06-10 Tianqi Zhao , Alan Hanjalic , Megha Khosla

Managing evolving graph data presents substantial challenges in storage and privacy, and training graph neural networks (GNNs) on such data often leads to catastrophic forgetting, impairing performance on earlier tasks. Despite existing…

Machine Learning · Computer Science 2025-05-29 Yinlin Zhu , Miao Hu , Di Wu

Continual Learning (CL) aims to incrementally acquire new knowledge while mitigating catastrophic forgetting. Within this setting, Online Continual Learning (OCL) focuses on updating models promptly and incrementally from single or small…

Machine Learning · Computer Science 2025-12-19 Giovanni Donghi , Luca Pasa , Daniele Zambon , Cesare Alippi , Nicolò Navarin

Online Continual learning is a challenging learning scenario where the model must learn from a non-stationary stream of data where each sample is seen only once. The main challenge is to incrementally learn while avoiding catastrophic…

Machine Learning · Computer Science 2022-06-24 Mattia Sangermano , Antonio Carta , Andrea Cossu , Davide Bacciu

Catastrophic forgetting is one of the main obstacles for Online Continual Graph Learning (OCGL), where nodes arrive one by one, distribution drifts may occur at any time and offline training on task-specific subgraphs is not feasible. In…

Machine Learning · Computer Science 2025-10-09 Giovanni Donghi , Daniele Zambon , Luca Pasa , Cesare Alippi , Nicolò Navarin

Real-life graph data often expands continually, rendering the learning of graph neural networks (GNNs) on static graph data impractical. Graph continual learning (GCL) tackles this problem by continually adapting GNNs to the expanded graph…

Machine Learning · Computer Science 2024-10-16 Chaoxi Niu , Guansong Pang , Ling Chen

Federated graph learning is a widely recognized technique that promotes collaborative training of graph neural networks (GNNs) by multi-client graphs.However, existing approaches heavily rely on the communication of model parameters or…

Machine Learning · Computer Science 2025-05-06 Hao Zhang , Xunkai Li , Yinlin Zhu , Lianglin Hu

In this work, we study the phenomenon of catastrophic forgetting in the graph representation learning scenario. The primary objective of the analysis is to understand whether classical continual learning techniques for flat and sequential…

Machine Learning · Computer Science 2021-03-23 Antonio Carta , Andrea Cossu , Federico Errica , Davide Bacciu

Graph condensation (GC) has gained significant attention for its ability to synthesize smaller yet informative graphs. However, existing studies often overlook the robustness of GC in scenarios where the original graph is corrupted. In such…

Machine Learning · Computer Science 2025-11-25 Jiayi Luo , Qingyun Sun , Beining Yang , Haonan Yuan , Xingcheng Fu , Yanbiao Ma , Jianxin Li , Philip S. Yu

A common challenge in continual learning (CL) is catastrophic forgetting, where the performance on old tasks drops after new, additional tasks are learned. In this paper, we propose a novel framework called ReCL to slow down forgetting in…

Machine Learning · Computer Science 2025-03-04 Pascal Janetzky , Tobias Schlagenhauf , Stefan Feuerriegel

Continual graph learning (CGL) aims to learn from dynamically evolving graphs while mitigating catastrophic forgetting. Existing CGL approaches typically adopt a task-based formulation, where the data stream is partitioned into a sequence…

Machine Learning · Computer Science 2026-05-15 Guiquan Sun , Xikun Zhang , Jingchao Ni , Dongjin Song

The burgeoning volume of graph data presents significant computational challenges in training graph neural networks (GNNs), critically impeding their efficiency in various applications. To tackle this challenge, graph condensation (GC) has…

Machine Learning · Computer Science 2024-06-13 Xinyi Gao , Tong Chen , Wentao Zhang , Yayong Li , Xiangguo Sun , Hongzhi Yin

Sequential learning of tasks using gradient descent leads to an unremitting decline in the accuracy of tasks for which training data is no longer available, termed catastrophic forgetting. Generative models have been explored as a means to…

Machine Learning · Computer Science 2020-09-30 Amanda Rios , Laurent Itti

Continual learning (CL) is the research field that aims to build machine learning models that can accumulate knowledge continuously over different tasks without retraining from scratch. Previous studies have shown that pre-training graph…

Computer Vision and Pattern Recognition · Computer Science 2024-06-17 Wei Wei , Tom De Schepper , Kevin Mets

Graphs are growing rapidly, along with the number of distinct label categories associated with them. Applications like e-commerce, healthcare, recommendation systems, and various social media platforms are rapidly moving towards graph…

Artificial Intelligence · Computer Science 2025-04-08 Aditya Hemant Shahane , Prathosh A. P , Sandeep Kumar

With the increasing computation of training graph neural networks (GNNs) on large-scale graphs, graph condensation (GC) has emerged as a promising solution to synthesize a compact, substitute graph of the large-scale original graph for…

Machine Learning · Computer Science 2025-10-09 Xinyi Gao , Yayong Li , Tong Chen , Guanhua Ye , Wentao Zhang , Hongzhi Yin

Federated Continual Learning (FCL) has recently emerged as a crucial research area, as data from distributed clients typically arrives as a stream, requiring sequential learning. This paper explores a more practical and challenging FCL…

Machine Learning · Computer Science 2025-06-17 Minh-Duong Nguyen , Le-Tuan Nguyen , Quoc-Viet Pham

With growing demands for data privacy and model robustness, graph unlearning (GU), which erases the influence of specific data on trained GNN models, has gained significant attention. However, existing exact unlearning methods suffer from…

Machine Learning · Computer Science 2024-10-10 Fan Li , Xiaoyang Wang , Dawei Cheng , Wenjie Zhang , Ying Zhang , Xuemin Lin

Graph Neural Network (GNN) ushered in a new era of machine learning with interconnected datasets. While traditional neural networks can only be trained on independent samples, GNN allows for the inclusion of inter-sample interactions in the…

Machine Learning · Computer Science 2023-12-29 Christopher Adnel , Islem Rekik