Journal of Mathematical Inequalities · Volume 7, Issue 1 Direct and inverse strong-type inequalities for Jackson-Matsuoka polynomials on the sphere 07-04 Pages 33-41 DOI 10.7153/jmi-07-04 Downloads Short PDF Full PDF PNG Authors Guo Feng Yuan Feng Keywords Jackson-Matsuoka polynomials best approximation modulus of smoothness K-functionals spherical means Subject classes 41A25 41A35 41A63