机构地区: 云南师范大学数学学院数学系
出 处: 《云南师范大学学报(自然科学版)》 1997年第3期6-10,共5页
摘 要: 给定欧氏空间Rn上正定矩阵(aij)n×n∶Rn→GL(n,R),本文借助测地线理论获得了非线性椭圆型微分方程组yixkT(aij(y(x)))n×nyixl=(akl(x))n×n解的唯一性定理。其中yi=yi(x),x∈Rn为未知函数。 In this paper we consider the differential equations of isometric transformation ∑i,ja ij (f(x))f ix kf jx l=a kl (x), 1≤k,l≤nwhere (a ij (x)) n×n is positive definite matrix, f i(x) are unknown functions, x=(x 1,…,x n), f=(f 1,…f n) . Applying group theory and geodesic theory in differential geometric, we have proved the uniqueness of the solution.