Finite time blow-up of semi-linear Klein-Gordon equations with positive initial energy in FLRW spacetimes

Published 14 May 2025 in math.AP | (2505.09077v1)

Abstract: Blowing-up solutions for semi-linear Klein-Gordon equations are considered in Friedmann-Lema^itre-Robertson-Walker spacetimes. Some sufficient conditions are shown by applying the concavity method for semi-linear wave equations in the Minkowski spacetime to semi-linear Klein-Gordon equations in FLRW spacetimes.

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