The Generic Approximation LemmaTools Hutton, Graham and Gibbons, Jeremy (2001) The Generic Approximation Lemma. Information Processing Letters, 79 (4). pp. 197-201. Full text not available from this repository.AbstractThe approximation lemma is a simplification of the well-known take lemma, and is used to prove properties of programs that produce lists of values. We show how the approximation lemma, unlike the take lemma, can naturally be generalised from lists to a large class of datatypes, and present a generic approximation lemma that is parametric in the datatype to which it applies. As a useful by-product, we find that generalising the approximation lemma in this way also simplifies its proof.
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