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Re: Fold and Cross

• To: mathgroup at smc.vnet.net
• Subject: [mg83965] Re: Fold and Cross
• From: Szabolcs Horvát <szhorvat at gmail.com>
• Date: Wed, 5 Dec 2007 07:21:17 -0500 (EST)
• References: <fj0moc$ifi$1@smc.vnet.net>

Just one more thing:

When working with scalar functions, you can directly assign to 
Derviative, e.g.

In[1]:= Derivative[1][f] = g
Out[1]= g

In[2]:= f'[x]
Out[2]= g[x]

See the doc page tutorial/DefiningDerivatives