how to compare two operators



probably it is "*"  not )*)


Valerij Pipin wrote:
> In chapter 8 of The Maxima  Book there is an interesting example about "part 
> hacking" (section 8.11) . That example does not work for me. I have a problem 
> even in the simpler case , say
> (C1) expr:x*y;
> (D1)                                  x y
> (C2) if part(expr,0)=}*} then 1 else 0;
> (D2)                                   0
> (C3) part(expr,0);
> (D3)                                   *
> The problem here is in  part(expr,0)=}*} . Note, such a syntax  was used in 
> the book.  I've never seen the possibilty to use  }*}. Is documented 
> somewhere? Sorry for stupid question, perhaps I overlooked some basics 
> things.
> 
> Best regards,
> Valerij
> 
> 
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