Lines Matching refs:delta
190 double delta = (x2 - x1);
191 double delta2 = delta * delta;
192 double b = (x - x1) / delta;
251 // c(y"_i) = 1/6 (a^3 - a) delta^2 (y"_i)
252 // d(y"_i_+1) = 1/6 (b^3 - b) delta^2 (y"_i+1)
254 // and delta:
255 // delta = x_i+1 - x_i
285 double delta = (x2 - x1);
286 double delta2 = delta * delta;
287 double b = (x - x1) / delta;