中国科学院数学与系统科学研究院期刊网
Relative n-Widths of the Classes of Differentiable Functions and the Periodic Convolution Classes in Lq Metric
Yong Ping LIU, Wei YANG
Acta Mathematica Sinica, Chinese Series . 2010, (6): 1087 -1096 .  DOI: 10.12386/A2010sxxb0122