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2014-07-10 15:53:52 +0100 received badge  Scholar (source)
2014-07-10 15:53:46 +0100 commented answer Replace a variable with a function

Thanks, it works!

2014-07-10 14:45:37 +0100 received badge  Editor (source)
2014-07-10 14:42:14 +0100 asked a question Replace a variable with a function

Hello i hope anyone can help me with the following problem.

i have the following code

T_w,y,T_m,k_f,rho_f,U_0,h_mstar,R, alpha, delta, Phi = var('T_w y T_m k_f rho_f U_0 h_mstar R alpha delta Phi')




now i would like to differentiate integralTu with respect to x (diff(integralTu,x)), but delta must be a function of x (i first defined it as a variable because of the integration).