yoonhong Member Member since Jan 12, 2009 Last active Jun 5, 2009 Total activities 0 Activity feed Recent contributions #Threads 17 years ago 09359a23-2244-40d9-9be6-33b503e450ea Dear Sir, 1)why ∆f(x, y)= λ∆g(x,y) where λ is the langrange multiplier can you show me the proof? thank you in advance😉
