Przemyslaw Koprowski, Victor Magron, Tristan Vaccon. Pourchet's theorem in action: decomposing univariate nonnegative polynomials as sums of five squares. In Alicia Dickenstein, Elias P. Tsigaridas, Gabriela Jeronimo, editors, Proceedings of the 2023 International Symposium on Symbolic and Algebraic Computation, ISSAC 2023, Tromsø, Norway, July 24-27, 2023. pages 425-433, ACM, 2023. [doi]
Abstract is missing.