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simplifying a resulted derivative expression
Hi, I have a function f[ux, uy, vx, vy, wx, wy, u, v, w, x, y] I am doing different manipulations with this function and the results I get have expressions like that: Derivative[0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0][f][ux, uy, vx, vy, wx, wy, u, v, w, x, y] which is difficult to understand. The question is how can I substitute automatically the above expression by: fu ? (it means I need to see that the derivative is taken over the 7th argument which is 'u' and write that f is derived with respect to u which I want to be written as fu) Can it be done? Thanks a lot!