Erdős problem 23 · problems.science

The blow-up of $C_5$ shows that the bound $n^2$ in Erdős Problem 23 is tight: any bipartite subgraph must omit at least $n^2$ edges.

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Technical detailsExact roots, source, and retained record identifiers

Problem row: sha256:99a63be68c775fda42adc01238f14d079edc909c944a89657bada7abe05de9f6
Metadata: sha256:278aa090cd8cee6f3e9bd493d8b2d546c60e14dc7633dd2ccd804510283c7ce4
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:d3883c746181913ef655b05da69dd06bb1afd33e1ff9f86b695c8de1775f0ddf

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207