On Thu, 10 Mar 2011, Barton Willis wrote:
< The derivative of %phi is zero because %phi is represents the number (1 + sqrt(5))/2 (the golden mean).
<
< --Barton
<
If you look at the online help for ', you will see this statement:
"The single quote does not prevent simplification."
As Barton indicates, Maxima considers diff(%phi,t) --> 0 to be a
simplification not an evaluation.
Leo
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