“…If we introduce the continuous variablesˆ andˆ 1 1 n , 2 2 n , (10.6.40) for small , we have the Taylor series , 1, i i 2 In terms of the physical variables, the Bäcklund transformation yields the discrete equations Faddeev condition 5, 13 Fermi,Pasta and Ulam problem 82,107,159,173,191 Fitness function 207,208,250,266,267 Fliess expansions 34 Flow velocity 220,221,224,228,229,234,235,238,239,240 5,7,8,10,12,17,90,95,100,101,103 Gaussian curvature 41,273,291,292,294 Gauss equation 294 Gaussian function 57 Genetic algorithm 197,204,207,208,209,251,252,201 Group of symmetry 53,62,63,64,65,…”