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dcposch/jc2-lean

Dan Clemens Posch

Palomar Registrypalomar/PALOMAR-2026-08-19-000005Aug 19, 2026math.AGscore 0

Lean 4 / Mathlib formalization of Theorem A (ODE rigidity, all weights; label thm:ode, Theorem 6.1 in the current compilation of the campaign paper): if polynomials A, C over an integral domain of characteristic zero and an integer weight nu >= 1 satisfy A*C' - nu*A'*C = c for a nonzero constant c, then deg A <= 1 (TheoremA). Also a standalone positive-characteristic strengthening extracted from the same proof (TheoremA_charP): the same conclusion over a domain of characteristic p under the degree bounds nu*deg A < p and deg C < p. The theorem is the rigidity engine of the depth-two block…

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