共 50 条
- [1] Best one-sided L1-approximation by harmonic functions manuscripta mathematica, 1998, 96 : 181 - 194
- [2] Best one-sided L1-approximation by blending functions ADVANCES IN MULTIVARIATE APPROXIMATION, 1999, 107 : 85 - 106
- [4] Best one-sided L1-approximation by harmonic and subharmonic functions ADVANCES IN MULTIVARIATE APPROXIMATION, 1999, 107 : 43 - 56
- [8] Best one-sided L1-approximation of bivariate functions by sums of univariate ones Archiv der Mathematik, 2000, 75 : 125 - 131