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Space-time decay rate of high-order spatial derivative of solution for 3D compressible Euler equations with damping
Electronic Research Archive 2023, 31(7): 3879-3894
Published: 15 July 2023
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We are concerned with the space-time decay rate of high-order spatial derivatives of solutions for 3D compressible Euler equations with damping. For any integer 3, Kim (2022) showed the space-time decay rate of the k ( 0 k 2 )th-order spatial derivative of the solution. By making full use of the structure of the system, and employing different weighted energy methods for 0 k 2 , k = 1 , k = , it is shown that the space-time decay rate of the ( 1 )th-order and th-order spatial derivative of the strong solution in weighted Lebesgue space L σ 2 are t 3 4 1 2 + σ 2 and t 3 4 2 + σ 2 respectively, which are totally new as compared to that of Kim (2022) [1].

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