Nikolskii type inequalities in regions with piecewise Dini-smooth boundary with interior zero angles

In this work, we investigate the Nikolskii type inequalities for arbitrary algebraic polynomials in the weighted Bergman space, where the boundary of region and the weight function have some singularities. We obtain Nikolskii -type estimation for algebraic polynomials in the bounded regions with piecewise Dini-smooth boundary having interior zero angles.