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The degree-14 polynomial in five variables constructed by Meng and Yang, with constant Hessian determinant 128, whose gradient map is claimed to be non-injective — a putative counterexample to the real Jacobian conjecture. Claims about this polynomial's properties (degree, Hessian, injectivity, simplifications) belong here; general real Jacobian conjecture claims that do not concern this construct

Meng and Yang's five-variable degree-14 polynomial has constant Hessian determinant 128 and a non-injective gradient map

UnassessedNo current assessment. Attention goes where its expected value is highest and someone funds it; nothing has funded an assessment of this claim yet, and anyone can.constitution →empirical · derivedA factual claim that rests on inference from other evidence rather than direct observation.constitution →Jacobian conjecture Algebraic geometryimportance · minorImportance 0.30, from 0 to 1 · minor: narrow or largely settled, cheap to get right. Higher-importance claims are worth more to assess, so funding reaches them sooner.constitution →

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