利用Steklov函数引进了一个新的连续模.利用这个连续模我们定义了L2中的2个特殊的函数类,并且给出了它们在L2中Kol mogorov n-宽度的精确值.
Using the Steklov function, a new modulus of continuity is introduced and two classes of functions in the space L2 are defined, and the exact values of their Kolmogorov n-width are calculated.