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On the radius of spatial analyticity for the Majda-Biello and Hirota-Satsuma systems

Published 25 Sep 2025 in math.AP | (2509.21095v1)

Abstract: We investigate the persistence of spatial analyticity for solutions to the Majda-Biello and Hirota-Satsuma systems with analytic initial data. This result is the first to establish analyticity persistence in such coupled KdV systems.

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