TY - Acta mathematica scientia,Series A A1 - Fangmei Sun, WuGaridi T1 - Exact Estimate of n-Widths of a Convolution Function Class in Orlicz Spaces Y1 - 2019-08-26 JF - Acta mathematica scientia, Series A JO - Acta mathematica scientia,Series A SP - 720 EP - 729 VL - 39 IS - 4 UR - http://121.43.60.238/sxwlxbA N1 - ER -