Some nonclassical potential symmetry generators and group-invariant of heat equation and wave equation were determined. 主要研究了热方程与波方程的非古典势对称群生成元及相应的群不变解。
Different types of waves and various phenomena pertaining to water and waves are introduced in this area. 本厅的主题是介绍波的种类及各种有关水与波的自然现像。