@InProceedings{gershtein_et_al:LIPIcs.ICDT.2022.4,
  author =	{Gershtein, Shay and Avron, Uri and Guy, Ido and Milo, Tova and Novgorodov, Slava},
  title =	{{On the Hardness of Category Tree Construction}},
  booktitle =	{25th International Conference on Database Theory (ICDT 2022)},
  pages =	{4:1--4:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-223-5},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{220},
  editor =	{Olteanu, Dan and Vortmeier, Nils},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICDT.2022.4},
  URN =		{urn:nbn:de:0030-drops-158785},
  doi =		{10.4230/LIPIcs.ICDT.2022.4},
  annote =	{Keywords: maximum independent set, approximation algorithms, approximation hardness bounds, taxonomy construction, category tree construction}
}