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can I use some user(self)defined function in Mathematica symbolic computation?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42436] can I use some user(self)defined function in Mathematica symbolic computation?
  • From: mizhael at yahoo.com (walala)
  • Date: Mon, 7 Jul 2003 03:06:01 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Dear all,

I want to find the 2nd Partial derivative of the function:
f(x, y)=Integrate[u(t, y), t={-x, x}]
where u(x, y) is another function, which is actually general and hence
unknown( I can use sin, cos, etc., ... but what I want is the general
result for that defferentiation...)

I want Mathematica to compute symbolically f_xx and f_yy of f(x, y), is
that possible?

Can anybody show me ?

Thanks a lot,

-Walala


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