Some Best Constants in the Landau Inequality on a Finite Interval Original Research Article

An additive form of the Landau inequality forf∈Wn∞[−1, 1],‖f(m)‖⩽1cm 1−mn T(m)n(1) ‖f‖+cn−m2n−1n! mn T(m)n(1) ‖f(n)‖is proved for 0