共 50 条
- [41] APPROXIMATION OF PERIODIC FUNCTIONS OF MANY VARIABLES BY TRIGONOMETRIC POLYNOMIALS DOKLADY AKADEMII NAUK SSSR, 1960, 132 (02): : 247 - 250
- [43] Approximation of some classes of functions of many variables by harmonic splines Ukrainian Mathematical Journal, 2013, 64 : 1151 - 1167
- [47] Trigonometric and orthoprojection widths of classes of periodic functions of many variables Ukrainian Mathematical Journal, 2009, 61 : 1589 - 1609
- [49] ESTIMATES FOR THE WIDTHS OF CLASSES OF PERIODIC FUNCTIONS OF SEVERAL VARIABLES - I EURASIAN MATHEMATICAL JOURNAL, 2010, 1 (03): : 11 - 26