本文探讨了一种将AC(关联性和交换性)运算符与Shostak方法相结合的非常有趣的论文。通常，理论组合有两种方法：nelson-oppen和Shostak。nelson-oppen方法只是在T求解器之间传递等式，因此很容易与AC结合。相比之下，Shostak方法需要计算规范化形式，这对于AC来说是不可能的。
Very interesting paper that combine AC(ssociativity and commutativity) operators with Shostak approach.
Generally, there are two approaches for theory combinations, nelson-oppen and Shostak.
The former one just pass equalities between T-solvers, so it is relativly easy to combine AC with it.
But for Shostak, it need to computer canonical form, which is not possible for AC.
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