摘要
研究了一种三角形区域上的非乘积型Ｂｅｒｎｓｔｅｉｎ多项式的导数的迭代极限和误差阶，给出了其逼近函数时的逼近阶估计。
In this paper,a non multiple type Bernstein polynomials which is defined on a triangular region is constructed.The author also gives the rate of convergence by derivative,limit of iterates and approximation function.
