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but it is not working The above does not describe the problem you are having. When you say not working, you need to explain how it is not working, and what you tried. I just downloaded it and I see no problem. Using V10.01, on windows. Downloaded it from http://library.wolfram.com/infocenter/MathSource/577/ Here are some examples ...


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While belisarius is right that you can usually make the list you want directly with Table, I'm often in a situation where I need to build up a list with a Do loop. Say I'm numerically propagating a wave function through a series of discrete time steps and need to collect the expectation values for several operators at each time point, this is how I do it. ...


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D[f[g[t]*h[t]], t] /. t -> 0 Derivative[1][f][ g[0] h[0]] (h[0] Derivative[1][g][0] + g[0] Derivative[1][h][0]) EDIT: I misread your post. Same approach D[f[g[t], h[t]], t] /. t -> 0 Derivative[1][h][0]* Derivative[0, 1][f][g[0], h[0]] + Derivative[1][g][0]* Derivative[1, 0][f][g[0], h[0]]



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