petsc-3.6.1 2015-08-06---- Minimum Surface Area Problem ----- mx: 32 my: 32 Tao Object: 16 MPI processes type: lmvm BFGS steps: 37 Scaled gradient steps: 1 Gradient steps: 0 TaoLineSearch Object: 16 MPI processes type: more-thuente convergence tolerances: fatol=0.0001, frtol=0.0001 convergence tolerances: gatol=1e-08, steptol=0, gttol=0 Residual in Function/Gradient:=0.00429586 Objective value=1.42106 total number of iterations=19, (max: 2000) total number of function/gradient evaluations=21, (max: 4000) Solution converged: estimated f(x)-f(X*) <= fatol