%0 Journal Article %A B. M. Yakhnin %T A~relationship between the Lebesgue functions of an expansion into series of Jacobi polynomials orthonormalized with the weight function $P(x)=\sqrt{\dfrac{1+x}{1-x}}$ and the Chebyshev polynomials %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1958 %P 202-207 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1958_1_a20/ %G ru %F IVM_1958_1_a20