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Why does Derivative fail in this case?

• To: mathgroup at smc.vnet.net
• Subject: [mg96557] Why does Derivative fail in this case?
• From: Aaron Fude <aaronfude at gmail.com>
• Date: Mon, 16 Feb 2009 06:58:26 -0500 (EST)

Hi,

This example is self-explanatory:

f[x_, y_] := x y
g = f[##]*f[##] &;
h = Derivative[1, 0][g];
g[x, y]
h[x, y]

I should expect that h[x, y] is 2 x y^2, but instead it is zero. How
come?

Version 6.0

Many thanks in advance,

Aaron

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  • Re: Why does Derivative fail in this case?
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