Lines Matching refs:fpre
425 fpre = f(xpre, *args)
429 root, status = _bisect_interval(xpre, xcur, fpre, fcur)
438 if fpre * fcur < 0:
440 fblk = fpre
447 fpre = fcur
449 fblk = fpre
461 if abs(spre) > delta and abs(fcur) < abs(fpre):
464 stry = -fcur * (xcur - xpre) / (fcur - fpre)
467 dpre = (fpre - fcur) / (xpre - xcur)
469 stry = -fcur * (fblk * dblk - fpre * dpre) / \
470 (dblk * dpre * (fblk - fpre))
486 fpre = fcur