picking out parts of a expresssion

• Subject: picking out parts of a expresssion
• From: Stavros Macrakis
• Date: Tue, 1 Apr 2003 12:44:38 -0500

> pull out the arguments of these 2 functions

An even easier way is as follows as long as your expression won't do
funny things if evaluated:

accumulate(arg):=list:if not member(arg,list) then list:cons(arg,list);

(list:[],ev(subst(accumulate,fresnelg,expr),accumulate),list)

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