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Erdős problem 1175

Let κ\kappa be an uncountable cardinal. Must there exist a cardinal λ\lambda such that every graph with chromatic number λ\lambda contains a triangle-free subgraph with chromatic number κ\kappa?

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sha256:e08f2fc13bd75097b71db9989de58362ca744d9dd9565bd1b832da1eeb25c62d
Metadata
sha256:40967be0019453a17197f942e2c7e1efeadbb4957abedacef594892689b6fe2d
Observation
sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content
sha256:88fbce9b76907ca92d74fcf709d3545b7a666f0c2ee9ea834819c6f4633e7de0
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sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection
sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit
2415f78e850aeee50afdca525c6f2e0ea606f207
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