Widths and cowidths of Hardy spaces

Abstract

The application of genetic algorithms to the analysis of surface x-ray diffraction data is discussed and the implementation of a genetic algorithm of evolutionary type is described in detail. The structure of Sn/Cu(100)-(3 √ 2 × √ 2)R45 • is determined on the basis of surface x-ray diffraction data analysed using this algorithm. The results are compared to previous findings using other techniques.

n-Widths, Faber Expansion, and Computation of Analytic Functions

“…Below s n stands for any of the n-widths d n , d n , n . Recently, in (Farkov, 1994), for the linear n-cowidth n it was shown that…”