We present a new approach for implementing polymorphism for bottom-up relational languages that avoids monomorphization. We begin by introducing semiringKanren, a bottom-up weighted relational programming language. We extend this base language to support polymorphism. We describe a new method to compile polymorphic semiringKanren programs into non-polymorphic ones, based on equality patterns and large-enough instances of polymorphic relations. We explain the correctness of this method. Finally, we consider existing work and suggest directions for future research.

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