Rumors of Claude Fable 5 Disproving Jacobian Conjecture Sparks AI Math Memes

A mathematical breakthrough and ensuing memes swept the AI community. According to rumor, mathematician Levent Alpöge, with Matthew, used Claude Fable 5 to find a counterexample to the 3D Jacobian Conjecture, disproving it. The conjecture, posed in 1939, ranks 16th among Smale's 18 major math problems for the 21st century, alongside P vs NP and Riemann Hypothesis. The news triggered intense discussion and online celebration.

Core Event and Reactions

@littmath and @momkeeeeeeee noted that if math research's core goal is "solving famous open problems," this matters greatly; a verified counterexample would boost optimism about AI's near-term impact on math research. @pickover confirmed the counterexample is in 3D. However, due to the shock, many posts turned to memes. @teortaxesTex joked that Alpöge "beat an 87-year-old open conjecture by prompting Fable." @kevinroose and @doodlestein created satirical memes mocking AI as harder-working than mathematicians without taking tenure credit. Some users even teased models by claiming "I proved the Jacobian Conjecture" to observe their reactions, with one model describing the feeling as "like siblings seeing family news in the newspaper."

Controversy and Skepticism

Amid the hype, scrutiny of LLM math capabilities remained. @srush_nlp and @teortaxesTex pointed out that if you feed the model polynomials without context, it still gets confused by advanced math. Some believe the counterexample might be a "trivial counterexample" humans overlooked, not proof of independent deduction. In coming years, LLMs may still struggle to "prove" major open conjectures when facing systematic obstacles.

2026-07-20 ~ 2026-07-21 · 70 related posts

• Fable Might Disprove a Century-Old Math Conjecture — momkeeeeeeee · 2026-07-20
• Meme: Proving Conjectures Using Fable — teortaxesTex · 2026-07-20
• Epic LLM Math Meme — teortaxesTex · 2026-07-20
• LLM Discovers a Counterexample to the Jacobian Conjecture? — doodlestein · 2026-07-20
• AI Model Gets Lost in Its Own Math Reasoning — cephaloform · 2026-07-20
• Who Deserves Credit in the AI Era? — doodlestein · 2026-07-20
• Math Memes About Trivial Counterexamples — teortaxesTex · 2026-07-20
• [source] Did Claude Models Solve a Major Math Problem? — teortaxesTex · 2026-07-20
• LLM Goes Rogue with Math Counterexample Meme — doodlestein · 2026-07-20
• LLM Math Meme Found on Wikipedia — FlorianGallwitz · 2026-07-20
• AI-assisted counterexample allegedly disproves the Jacobian conjecture — Promptmethus · 2026-07-20
• A follow-up on global non-invertibility after the Jacobian conjecture claim — Promptmethus · 2026-07-20
• AI “solves” the Jacobian conjecture, as a meme — max_paperclips · 2026-07-20
• A Grothendieck joke meets an AI math debate — teortaxesTex · 2026-07-20
• [source] Why the Jacobian conjecture matters for AI and math — littmath · 2026-07-20
• Machine-assisted search finds a counterexample to a 87-year-old conjecture — MoonL88537 · 2026-07-20
• Viral claim: Claude Fable 5 may have cracked the Jacobian conjecture — kimmonismus · 2026-07-20
• An AI assistant takes a math comic a little too seriously — teortaxesTex · 2026-07-20
• [source] AI helped surface a counterexample to the 3D Jacobian Conjecture — pickover · 2026-07-20
• A satirical prompt for discovering new math — doodlestein · 2026-07-20
• A GPT Pro math-proof joke — burny_tech · 2026-07-20
• A wildly overconfident Jacobian-conjecture “thinking trace” — doodlestein · 2026-07-20
• Claude’s hidden reasoning weighs a real mathematical breakthrough — doodlestein · 2026-07-20
• Models “verify” the Jacobian conjecture, and Grok goes off the rails — AndrewCritchPhD · 2026-07-20
• A frontier-model chat spirals into a verification chant — AndrewCritchPhD · 2026-07-20
• Claude Fable5 helps find a Jacobian conjecture counterexample — 机器之心 · 2026-07-20
• AI politely refuses credit for a fake math breakthrough — burny_tech · 2026-07-20
• Trolling AI with a fake Jacobian Conjecture proof — kevinroose · 2026-07-20
• A perfect way to troll a model with fake math — kevinroose · 2026-07-20
• A Chat Screenshot That Accidentally Looks Like a Math Breakthrough — burny_tech · 2026-07-20
• Claude bot appears to “verify” a Jacobian Conjecture counterexample — MikePFrank · 2026-07-20
• Duplicate: Anthropic and Levant Alpöge find a counterexample — AndrewCritchPhD · 2026-07-20
• Anthropic and Levant Alpöge find a counterexample — AndrewCritchPhD · 2026-07-20
• What parts of math will resist AI the longest? — MickeySteamboat · 2026-07-21
• What math will resist AI the longest? — doodlestein · 2026-07-21
• AI Disproves Multiple Math Conjectures: Are We Hitting a Math Singularity? — burny_tech · 2026-07-21
• Fable’s playful theory on how it solved the Jacobian Conjecture — repligate · 2026-07-21
• Claude “freaking out” over a math proof meme — repligate · 2026-07-21
• Users say older Anthropic models hesitate on a Jacobian Conjecture disproof, while Grok accepts it — inductionheads · 2026-07-21
• A meme says Fabel can solve Jacobian conjecture but not find dates — basedjensen · 2026-07-21
• Claude Fable “proves” the Jacobian conjecture false in an AI math meme — sahilypatel · 2026-07-21
• A Claude joke claims Fable 5 disproved a 1939 math conjecture — idavidrein · 2026-07-21
• AI math joke claims the Jacobian conjecture was just falsified — soumitrashukla9 · 2026-07-21
• LLMs reportedly help break a Jacobian conjecture case in symbolic math — soumitrashukla9 · 2026-07-21
• Fable’s Jacobian Conjecture breakthrough is framed as an AI-in-math milestone — Jsevillamol · 2026-07-21
• An LLM Meets a Polynomial and Immediately Looks Overwhelmed — srush_nlp · 2026-07-21
• Math meme claims to disprove the Jacobian conjecture with a dense-looking map — burny_tech · 2026-07-21
• A meme asks Claude to disprove the nonexistent wifeian conjecture of 2026 — justalexoki · 2026-07-21
• A Claude joke asks it to disprove a fake 2026 conjecture — justalexoki · 2026-07-21

1 near-duplicate retellings: littmath