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337•07/11/2026, 00:00•2 min read

GPT-5.6 Sol Proves 50-Year Hypothesis on Double Covering Cycles

GPT-5.6 Sol Proves 50-Year Hypothesis on Double Covering Cycles
Executive TL;DR30s read

The new GPT-5.6 Sol model has generated a proof of a 50-year-old hypothesis regarding double covering cycles, which could be a significant achievement in graph theory.

GPT-5.6 Sol Proves 50-Year Hypothesis on Double Covering Cycles

This is one of the oldest open problems in graph theory, formulated by Dyer Szekeres in 1973.

The hypothesis states that for any graph without bridges, there exists a set of cycles such that each edge of the graph is included in exactly two of these cycles.

The hypothesis is indeed very important as it relates to the theory of nowhere-zero flows—a central theme in structural graph theory. Double covering has been attempted to be proven many times, but none of the attempts have been recognized as a definitive solution.

Just a few hours ago, an employee of OpenAI announced that the new GPT-5.6 Sol model generated a proof of this hypothesis in just one hour, using 64 subagents!

The proof has been published, but it has not yet been verified by the mathematical community, and discussions are ongoing. If verified, this will be one of the largest and most significant AI-generated proofs to date.

Why it matters

Analysis

This discovery could have a tremendous impact on the development of graph theory and artificial intelligence, opening new avenues for research in this field.

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