On Apr 12, 5:57 pm, Eckhard Kosin <e...@mathematik-service-kosin.de>
wrote:
> I think I understand: After
>
> expr(x) = sin(x)
>
> expr is a symbolic expression and can be differentiated and the same
> goes for sin after
>
> sin(x) = sin(x)
Yes. And the same thing can be done for other functions. In
particular, in your example with h2,
sage: function('f')
sage: h2 = lambda t: sin(f(t))
sage: h2(x)=h2(x)
sage: h2.diff()
x |--> cos(f(x))*D[0](f)(x)
Alec
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