From: david.billinghurst (Billinghurst, David RTATECH)
Date: Thu, 23 Nov 2006 15:12:50 +1100
> From: Wang Yuheng
>
> Code:
> (%i1)eq:'diff(%phi,t);
> (%o1)0
>
> Why? If I raplace '%phi' by a latin letter such as 'f', it displays:
> (%i2)eq:'diff(f,t);
> (%o2) df
> ----
> dt
> Why?
%phi is (1+sqrt(5))/2 ~ 1.618...
Try evaluating %phi,numer;
Not sure if this is documented.
David
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