Acta mathematica scientia,Series A ›› 2018, Vol. 38 ›› Issue (1): 122-133.

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Uniform Decay for a Fourth-Order Viscoelastic Equation with Density in Rn

Feng Baowei1, Su Keqin2   

  1. 1. Department of Economic Mathematics, Southwestern University of Finance and Economics, Chengdu 611130;
    2. College of Information and Management Science, Henan Agricultural University, Zhengzhou 450046
  • Received:2016-10-28 Revised:2017-04-01 Online:2018-02-26 Published:2018-02-26
  • Supported by:
    Supported by the NSFC (11701465), the Fundamental Research Funds for the Central Universities (JBK170127) and the Key University Science Research Project of Henan Province (16A110032)

Abstract: In this paper, we investigate a fourth-order linear viscoelastic equation with density in the whole space Rn (n ≥ 4). To compensate the lack of Poincaré's inequality in Rn, we consider the solutions in weighted spaces. Under suitable assumptions on the relaxation function, we establish a general decay result of solution for the initial value problem by using energy perturbation method. Our result extends earlier results.

Key words: Energy decay, Fourth-order equation, Weighted space, Density

CLC Number: 

  • O175.21
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