@article{Брисіна_Макарічев_2016, title={Approximation properties of generalized Fup-functions}, volume={84}, url={https://periodicals.karazin.ua/mech_math/article/view/8566}, DOI={10.26565/2221-5646-2016-84-06}, abstractNote={Generalized Fup-functions are considered. Almost-trigonometric basis theorem is proved. Spaces of linear combinations of shifts of the generalized Fup-functions are constructed and an upper estimate of the best approximation of classes of periodic differentiable functions by these spaces in the norm of $L_2[-\pi,\pi]$ is obtained.}, journal={Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics}, author={Брисіна, І. В. and Макарічев, В. О.}, year={2016}, month={Dec.}, pages={61-92} }