示例#1
0
 def iter_terms(self):
     return iter_emptyset()
示例#2
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 def iter_quads(self):
     return iter_emptyset()
示例#3
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 def iter_variables(self):
     return iter_emptyset()
示例#4
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 def iter_terms(self):
     # iterates over alllinear terms, if any
     return iter_emptyset()