Jackson 1911: best polynomial approximation E_n(f) <= C omega(f, 1/n) where omega is modulus of continuity; quantitative rate of polynomial approximation; basis of constructive approximation.
Jackson 1911: best polynomial approximation E_n(f) <= C omega(f, 1/n) where omega is modulus of continuity; quantitative rate of polynomial approximation; basis of constructive approximation.