Abstract:
The inequality between the uniform norm of the derivative of order ℓ of an algebraic polynomial of degree n and the L1-norm of the polynomial itself on a segment are studied. For all ℓ⩾(n−1)/3, the exact constant and the extremal polynomial are written out.
Citation:
I. E. Simonov, “A Sharp Markov Brothers-Type Inequality in the Spaces L∞ and L1 on the Segment”, Mat. Zametki, 93:4 (2013), 604–613; Math. Notes, 93:4 (2013), 607–615