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Abstract
As a way to implement the "right to be forgotten" in machine learning,
\textit{machine unlearning} aims to completely remove the contributions and
information of the samples to be deleted from a trained model without affecting
the contributions of other samples. Recently, many frameworks for machine
unlearning have been proposed, and most of them focus on image and text data.
To extend machine unlearning to graph data, \textit{GraphEraser} has been
proposed. However, a critical issue is that \textit{GraphEraser} is
specifically designed for the transductive graph setting, where the graph is
static and attributes and edges of test nodes are visible during training. It
is unsuitable for the inductive setting, where the graph could be dynamic and
the test graph information is invisible in advance. Such inductive capability
is essential for production machine learning systems with evolving graphs like
social media and transaction networks. To fill this gap, we propose the
\underline{{\bf G}}\underline{{\bf U}}ided \underline{{\bf I}}n\underline{{\bf
D}}uctiv\underline{{\bf E}} Graph Unlearning framework (GUIDE). GUIDE consists
of three components: guided graph partitioning with fairness and balance,
efficient subgraph repair, and similarity-based aggregation. Empirically, we
evaluate our method on several inductive benchmarks and evolving transaction
graphs. Generally speaking, GUIDE can be efficiently implemented on the
inductive graph learning tasks for its low graph partition cost, no matter on
computation or structure information. The code will be available here:
https://github.com/Happy2Git/GUIDE.