Conjectural unstable Poincaré–Hopf formula at non-rational points
Conjectural unstable Poincaré–Hopf formula at non-rational points
Let be a pointed rational function with vanishing locus . Let denote the monic minimal polynomial of for each . At each zero, let the unstable local degree be
where denotes the Grothendieck–Witt group over . Unstable Poincaré–Hopf conjecture. The unstable degree of should decompose as
This conjecture removes the rationality assumption from the corresponding Poincaré–Hopf formula and predicts the correction contributed by the minimal polynomials of the non-rational zeros through the tolerant of their product. Its status is not established in the supplied text.
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Primary source
Swechchha Adhikari, Brent Hall and Stephen McKean, “Tolerants”, arXiv:2506.22897 (2025).
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