We introduce a self-supervised approach for learning node and graph level representations by contrasting structural views of graphs. We show that unlike visual representation learning, increasing the number of views to more than two or contrasting multi-scale encodings do not improve performance, and the best performance is achieved by contrasting encodings from first-order neighbors and a graph diffusion. We achieve new state-of-the-art results in self-supervised learning on 8 out of 8 node and graph classification benchmarks under the linear evaluation protocol. For example, on Cora (node) and Reddit-Binary (graph) classification benchmarks, we achieve 86.8% and 84.5% accuracy, which are 5.5% and 2.4% relative improvements over previous state-of-the-art. When compared to supervised baselines, our approach outperforms them in 4 out of 8 benchmarks. Source code is released at: https://github.com/kavehhassani/mvgrl

文章介绍了通过对比不同结构视图的图表达学习来实现自监督学习，相对于多视图或多尺度编码，通过对比一阶邻居和图扩散编码能够获得最佳表现。该方法在8个节点和图分类基准测试中取得了新的最佳结果，在Cora（节点）和Reddit-Binary（图）分类基准测试中，取得了86.8％和84.5％的准确性，在4个基准测试中优于有监督的基线。

基于对比的多视图图形表示学习