tags-math-sx

Overview
This is a temporal higher-order network dataset, which here means a sequence of timestamped hyperedges where each hyperedge is a set of nodes. In this dataset, nodes are tags, and hyperedges are the sets of tags applied to questions on math.stackexchange.com.
Each hyperedge corresponds to all of the tags used in a post, and each node in a hyperedge corresponds to a tag. The timestamps are normalized so that the earliest tag starts at 0 and are in millisecond resolution.
Statistics
Some basic statistics of this dataset are:

number of nodes: 1,629
number of timestamped hyperedges: 822,059
number of unique hyperedges: 174,933
Source of original data
Source: tags-math-sx dataset
References
If you use this data, please cite the following paper:

Simplicial closure and higher-order link prediction. Austin R. Benson, Rediet Abebe, Michael T. Schaub, Ali Jadbabaie, and Jon Kleinberg. Proceedings of the National Academy of Sciences (PNAS), 2018.