A type-theoretical alternative to ISWIM, CUCH, OWHY
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An abstract data type for real numbers
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Admissible Representations of Limit Spaces
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Abstract versus concrete computation on metric partial algebras
ACM Transactions on Computational Logic (TOCL)
A Nonstandard Characterisation of the Type-structure of Continuous Functionals Over the Reals
Electronic Notes in Theoretical Computer Science (ENTCS)
Electronic Notes in Theoretical Computer Science (ENTCS)
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We compare two natural constructions, the A-hierarchy and the R-hierarchy, of hereditarily total, continuous and extensional functionals of finite types over the reals. The A-hierarchy is based on the closed interval domain representation of the reals while the R-hierarchy is based on the binary negative digit representation. We show that the two hierarchies share a common maximal core. To this end, we construct an alternative to the R-hierarchy and prove a density theorem for this alternative hierarchy.