|  |  D.8.6.13 containedQ Procedure from libraryzeroset.lib(see  zeroset_lib).
 
Usage:
containedQ(data, f [, opt]); data=list; f=any type; opt=integer
Purpose:
test if f is an element of data.
Return:
int
0 if f not contained in data
 1 if f contained in data
 
Options:
opt = 0 : use '==' for comparing f with elements from dataopt = 1 : use
 sameQfor comparing f with elements from data
 
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