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37 T fract1, fract2; // minimal relative movement in x in brent_find_minima() local51 fract1 = tolerance * fabs(x) + tolerance / 4; in brent_find_minima()52 fract2 = 2 * fract1; in brent_find_minima()56 if(fabs(delta2) > fract1) in brent_find_minima()81 delta = (mid - x) < 0 ? (T)-fabs(fract1) : (T)fabs(fract1); in brent_find_minima()91 …u = (fabs(delta) >= fract1) ? T(x + delta) : (delta > 0 ? T(x + fabs(fract1)) : T(x - fabs(fract1)… in brent_find_minima()