GPT-5.6 Didn't Solve a 50-Year-Old Math Problem. A Mathematician Did, With Great Autocomplete.
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The headline On July 18, OpenAI published a three-page PDF titled A Proof of the Cycle Double Cover Conjecture , attributed to GPT-5.6 Sol Ultra. The Cycle Double Cover Conjecture is a genuinely hard, genuinely open problem in graph theory — every bridgeless graph has a set of cycles that covers each edge exactly twice, allegedly, and nobody's proven it since it was posed in the 1970s. The story that spread: an AI cracked a 50-year-old problem in under an hour using 64 parallel subagents. It…
1Key Takeaways
- The headline On July 18, OpenAI published a three-page PDF titled A Proof of the Cycle Double Cover Conjecture , attributed to GPT-5.6 Sol Ultra.
- The Cycle Double Cover Conjecture is a genuinely hard, genuinely open problem in graph theory — every bridgeless graph has a set of cycles that covers each edge exactly twice, allegedly, and nobody's proven it since it was posed in the 1970s.
- The story that spread: an AI cracked a 50-year-old problem in under an hour using 64 parallel subagents.
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that the headline On July 18, OpenAI published a three-page PDF titled A Proof of the Cycle Double Cover Conjecture , attributed to GPT-5.6 Sol Ultra.
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