18   PetscReal        lambda, lambda_old, lambda_mid, lambda_update, delLambda;  in SNESLineSearchApply_Secant()  local
27   PetscCall(SNESLineSearchGetLambda(linesearch, &lambda));  in SNESLineSearchApply_Secant()
44   lambda_mid = 0.5 * (lambda + lambda_old);  in SNESLineSearchApply_Secant()
62         PetscCall(VecWAXPY(W, -lambda, Y, X));  in SNESLineSearchApply_Secant()
78         PetscCall(VecWAXPY(W, -lambda, Y, X));  in SNESLineSearchApply_Secant()
86 … search: objective function at lambda = %g is infinity or NaN, cutting lambda\n", (double)lambda));  in SNESLineSearchApply_Secant()
91       if (lambda <= minlambda) {  in SNESLineSearchApply_Secant()
94 …ambda_min = %g is infinity or NaN, can not further cut lambda\n", (double)lambda, (double)lambda));  in SNESLineSearchApply_Secant()
102       maxlambda = .95 * lambda;  in SNESLineSearchApply_Secant()
105       lambda     = .5 * (lambda + lambda_old);  in SNESLineSearchApply_Secant()
106       lambda_mid = .5 * (lambda + lambda_old);  in SNESLineSearchApply_Secant()
113 …  Line search: lambdas = [%g, %g, %g], fnorms = [%g, %g, %g]\n", (double)lambda, (double)lambda_mi…  in SNESLineSearchApply_Secant()
115 …"    Line search: lambdas = [%g, %g, %g], obj = [%g, %g, %g]\n", (double)lambda, (double)lambda_mi…  in SNESLineSearchApply_Secant()
121     delLambda = lambda - lambda_old;  in SNESLineSearchApply_Secant()
151     if (del2Fnrm > 0.) lambda_update = lambda - delFnrm / del2Fnrm;  in SNESLineSearchApply_Secant()
152     else if (del2Fnrm < 0.) lambda_update = lambda + delFnrm / del2Fnrm;  in SNESLineSearchApply_Secant()
163     if (lambda_update < minlambda) lambda_update = 0.5 * (lambda + lambda_old);  in SNESLineSearchApply_Secant()
181     lambda_old = lambda;  in SNESLineSearchApply_Secant()
182     lambda     = lambda_update;  in SNESLineSearchApply_Secant()
184     lambda_mid = 0.5 * (lambda + lambda_old);  in SNESLineSearchApply_Secant()
194   PetscCall(VecWAXPY(W, -lambda, Y, X));  in SNESLineSearchApply_Secant()
198   PetscCall(SNESLineSearchSetLambda(linesearch, lambda));  in SNESLineSearchApply_Secant()
201     if (!changed_w) PetscCall(VecWAXPY(W, -lambda, Y, X));  in SNESLineSearchApply_Secant()
212 …(monitor, "    Line search terminated: lambda = %g, fnorm = %g\n", (double)lambda, (double)gnorm));  in SNESLineSearchApply_Secant()