Lines Matching defs:x2
175 // [x1, x2] is the bracketing interval in each iteration
176 // x3 is the midpoint of [x1, x2]
180 double x2 = max;
181 double y2 = f.value(x2);
196 final double x3 = 0.5 * (x1 + x2);
220 // Ridders' method guarantees x1 < x < x2
223 x2 = x;
227 x2 = x3;
231 } else { // x3 < x < x2
237 x2 = x;
