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Re: Derivative


In article <blj5lk$1f5$1 at smc.vnet.net>,
 "extrabyte" <extrabyte22 at libero.it> wrote:

> Paul Abbott wrote:
> > and compute its derivative with respect to y.
> >
> >   dhdy[x_, y_] = Simplify[D[h[x,y],y]];
> 
> ehm, "Simplify" or "Evaluate"?

Evaluate is not required because Set (=) is used instead of SetDelayed 
(:=). Simplify is likely to be better because you then need to 
numerically integrate dhdy.

Cheers,
Paul

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