讨论了Fourier-Jacobi级数的Vallée-Poussin平均的收敛性.用Peetre K-泛函估计了Vallée-Poussin平均的逼近阶.
The paper deals with the approximation properties of the de la Vallée - Poussin means for the Fourier - Jaeobi expansions. The approximation order is obtained by making use of the Peetre K - functional and the modulus of continuity.