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Erdős problem 593

Which finite triple systems occur in every triple system of uncountable chromatic number? The claimed characterization: exactly those that, after removing isolated vertices, are linear, have every hyperedge-node of their Levi graph meeting a bridge, and have every Berge cycle even.

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Problem row
sha256:f63e794eb5a4ebed86edc2be7cb1c67fdb4163674788c23c824134a6c00f26ac
Metadata
sha256:d2c99a9a07f2a167de1c2d71f49c346b451382eab97bd52bc6000e9058509343
Observation
sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
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sha256:b79ad7a8dd5dcef62bc1fdcccde4c83c7414643fc71e659e3e32c6d31f820ed3
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sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit
2415f78e850aeee50afdca525c6f2e0ea606f207

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