<正> Methods of approximation,which interpolate to given values on the boundary of a trian-gle,are presented.These methods have linear weights and are characterized on the basis ofminimizing pseudonorm.Some forthcoming research projects are finally indicated.They willbe related in part with some recent Ubiratan D'Ambrosio and Dicesar Lass Fernandez researchworks.
<正> 本文完成于一九六五年.讨论具多个空间变元的一阶拟线性方程(?)u/(?)t+sum from n=1 to n (?)F_i(t,X,u)/(?)x_i=0 X=(x_1,…,x_n)(A)Cauchy 问题广义解的唯一性.以及具间断右端的常微分方程组dX/dt=f(t,X) (B)广义解所构成的积分漏斗的某些性质.