方程k_t=k^2(k_(θθ)+k)的不变群

Invariant Groups of Equation k_t=k^2(k_(θθ)+k)

利用PDE在Lie群下的不变性理论研究了方程kt=k2(kθθ+k)的不变群,得到了方程的一些不变群,并给出其几何解释.

In this paper, using the invariance of a PDE, the author studies invariant groups of equation kt=k^2（kθθ＋k）. Several invariant groups are given and we gives out the geometric significane of the invariant groups.