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 Author Comment/Response Irving Zhu 02/23/09 03:35am Hi All, I am having some problems with Simplify[] or FullSimplify[]. Suppose I have some function f[x_, t_]:= x * g[d] + t* h[d] + ... where d[x_,t_]:=... is an intermediate variable also expressed in x and t. Supposed I want to find out D[f[x,t],t]. Now if a human being is to do this, he or she will try to express the results in a mix of d, x, and t in such a way that the end result "looks simple." If Mathematica were to do it, it will express the end result only in x and t, and this makes the end result extremely complicated. I tried D[f[x,t],t], Simplify[D[f[x,t],t]], and FullSimplify[D[f[x,t],t]], and none of them will express the end result with intermediate variables to make it simple. Does anyone know how to do this with Mathematica? Thanks, Irving Zhu URL: ,

 Subject (listing for 'Smart Simplify with intermediate variables') Author Date Posted Smart Simplify with intermediate variables Irving Zhu 02/23/09 03:35am Re: Smart Simplify with intermediate variables yehuda ben-s... 02/24/09 08:18am
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