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Lecture Notes in Computer Science
We investigate a hierarchical combination approach to the unification problem in non-disjoint unions of equational theories. In this approach, the idea is to extend a base theory with some additional axioms given by rewrite rules in such way that the unification algorithm known for the base theory can be reused without loss of completeness. Additional techniques are required to solve a combined problem by reducing it to a problem in the base theory. In this paper we show that the hierarchicaldoi:10.1007/978-3-319-24246-0_18 fatcat:24wjjgrewrgmjjcgpss7ntteni