Adding new derivation rule

• Subject: Adding new derivation rule
• From: Jérome Laurens
• Date: Mon, 18 Jun 2012 16:56:53 +0200

Hi list,

suppose myF and myG are 2 custom functions such that
diff(myF(x),x)=myG(x)

How can I get Maxima to expand for example

diff(sin(myF(x)),x)

into

myG(x)*cos(myF(x))

and more generally

diff(func(myF(x)),x)

into

myG(x)*diff(func(t),t)|t=myF(x))

where func may be an unknown function.

TIA

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