/FSF-2020/calculus-of-several-variables/approximations-and-optimizations/Critical-Points/
../
file2_Traces_and_Tangent.py
file3_Tangent_plane_at_extrema_of_a_function.py
file4_Types_of_critical_points.py
file5_f(x,y)=(y-x)(1-2x-3y).py