Acta mathematica scientia,Series A ›› 2024, Vol. 44 ›› Issue (6): 1550-1562.

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Global Existence and Blow-Up for Semilinear Third Order Evolution Equation with Different Power Nonlinearities

Shi Jincheng1(),Liu Yan2,*()   

  1. 1Department of Apllied Mathematics, Guangzhou Huashang College, Guangzhou 511300
    2Department of Applied Mathematics, Guangdong University of Finance, Guangzhou 510521
  • Received:2023-08-31 Revised:2024-04-29 Online:2024-12-26 Published:2024-11-22
  • Supported by:
    NSFC(11223344);Guangdong Natural Science foundation(2023A1515012044);Scientific Research Team Funding of Guangzhou Huashang College(2021HSKT01);Science foundation of Guangzhou Huashang College (Qualitative Study of Thermoelastic Equations)(2024HSTS09)

Abstract:

This paper studies the Cauchy problem of a class of semilinear third-order evolution equations with different power-type nonlinear terms. Its linearized model is derived from the classical thermoelastic plate equations considering Fourier's law. Firstly, by using the appropriate $L^r\!-\!L^q$ estimation away from the asymptote and combining with the Banach fixed point theorem, the existence of the global solution under small initial conditions is obtained. Secondly, for the nonlinear terms that satisfy specific conditions, the explosion of the solution is proved by the test function method. Finally, based on these research results, some critical indicators of the semilinear third-order model are obtained.

Key words: Global existence of solution, Semilinear third order evolution equation, Blow-up, Thermoelastic plate equations

CLC Number: 

  • 0175.2
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