Supported by the Guangdong Natural Science foundation(2023A1515012044);Special Project of Guangdong Province in Key Fields of Ordinary Colleges and Universities(2023ZDZX4069);the Research Team of Guangzhou Huashang College(2021HSKT01);Guangzhou Huashang College’s Characteristic Research Projects(2024HSTS09)。
In this article,the viscoelastic damped was equation in three-dimensional cylindrical domain were studied by using a second-order differential inequality.We proved a Phragm´en-Lindelof alternative results,i.e.,the sm...