Ukr. Mat. Zh. - 1995. - 47, № 9. - pp. 1170–1175
The even-dimensional Kolmogorov widthsd 2n , Gel'fand widthsd 2n , and linear widths δ2n ofÃ inL q andC are determined exactly. We show that all threen-widths are equal and give a characterization of the widths in terms of Blaschke products.