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You are not logged in. #1 20121021 21:11:01
Partial Derivative ProofI came across an interesting tool which would help for differentiating functions involving x and y; where f is a function of x and y and the deltas denote partial derivatives. But why is this the case? #2 20121021 21:55:38
Re: Partial Derivative ProofHi zetafunc.; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #3 20121021 21:56:55
Re: Partial Derivative ProofYes, I agree. It was useful for solving the ODEs we were given in class when we had to differentiate annoying functions twice and sub initial conditions, etc... do you remember how it is derived? #4 20121021 22:03:33
Re: Partial Derivative ProofHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #5 20121021 22:15:51
Re: Partial Derivative ProofThanks. I am particularly confused by the minus sign. #6 20121021 22:44:37
Re: Partial Derivative ProofHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20121021 22:59:31
Re: Partial Derivative ProofAs part of the proof, they are saying that is the total differential of the function f(x,y). Why? #8 20121021 23:05:34
Re: Partial Derivative ProofHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #9 20121021 23:28:31
Re: Partial Derivative ProofHmm. I think maybe that comes from an illustration. #10 20121022 01:25:47
Re: Partial Derivative ProofIt looks like it comes from the total derivative but I can not understand their notation so I can not derive it. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 