Fable 5 is credited with a 3-variable counterexample to the Jacobian conjecture
Various-Affect4841 · reddit · 2026-07-21
A Reddit post summarizes a video about Fable 5 supposedly finding a concise 3-variable polynomial counterexample to Keller’s 1939 Jacobian conjecture.
Key points from the breakdown:
- The map keeps a constant determinant of -2.
- It still sends three separate input coordinates to (-1/4, 0, 0).
- The explanation highlights how non-proper maps can evade local invertibility intuition by pushing preimage boundaries off to infinity.
The post treats the result as a striking math/demo moment rather than a formal paper link.
More from Models
- Only 2 of 25 full ChatGPT rewrites flagged 100% AI by detectors — paulnovosad · 2026-10-26
- Qwen 4 Reportedly Spotted in the Arena, Hints at Alibaba's Next-Gen Model Testing — AIFlow_ML · 2026-10-26
- Nathan Lambert's first open models lecture: distillation, risks and the ecosystem explained — natolambert · 2026-10-26
- Nanbeige 4.3-33B flops real-world test: zero compilable output vs Qwen — julianharris · 2026-10-26
- Claude's safety classifier blocks SS7 defense research, pushing a security dev to an abliterated GLM — l4rz · 2026-10-26
- Black Forest Labs open-sources 5.6B FLUX 3 Image Klein, +91 Elo with 38% fewer params — dl_weekly · 2026-10-26