2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67910We study the Delsarte problem for even functions continuous on [-1,1], nonpositive on [-1/2,1/2], and representable as series with respect to the ultraspherical polynomials. The value of the Delsarte problem gives an upper bound for the largest power of antipodal spherical 1/2-code of the space Rm.30 pages, LaTeXClassical Analysis and ODEs94B65; 33C45text