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• W2094878497 abstract "The study of self-testing/correcting programs was introduced in [8] in order to allow one to use program P to compute function f without trusting that P works correctly. A self-tester for f estimates the fraction of x for which P (x) = f(x); and a self-corrector for f takes a program that is correct on most inputs and turns it into a program that is correct on every input with high probability . Both access P only as a black-box and in some precise way are not allowed to compute the function f . Self-correcting is usually easy when the function has the random self-reducibility property. One class of such functions that has this property is the class of multivariate polynomials over finite fields [4] [12]. We extend this result in two directions. First, we show that polynomials are random self-reducible over more general domains: specifically, over the rationals and over noncommutative rings. Second, we show that one can get self-correctors even when the program satisfies weaker conditions, i.e. when the program has more errors, or when the program behaves in a more adversarial manner by changing the function it computes between successive calls. Self-testing is a much harder task. Previously it was known how to self-test for a few special examples of functions, such as the class of linear functions. We show that one can self-test the whole class of polynomial functions over Zp for prime p. ∗U.C. Berkeley. Supported by NSF Grant No. CCR 8813632 †Princeton University. ‡Princeton University. Supported by DIMACS (Center for Discrete Mathematics and Theoretical Computer Science), NSF-STC88-09648. §U.C. Berkeley. Part of this work was done while this author was visiting IBM Almaden. ¶Hebrew University and Princeton University. Partially supported by the Wolfson Research Awards administered by the Israel Academy of Sciences and Humanities. 1[12] independently introduces a notion which is essentially equivalent to self-correcting. We initiate the study of self-testing (and self-correcting) programs which only approximately compute f . This setting captures in particular the digital computation of real valued functions. We present a rigorous framework and obtain the first results in this area: namely that the class of linear functions, the log function and floating point exponentiation can be self-tested. All of the above functions also have self-correctors." @default.
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• W2094878497 date "1991-01-01" @default.
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• W2094878497 title "Self-testing/correcting for polynomials and for approximate functions" @default.
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• W2094878497 doi "https://doi.org/10.1145/103418.103429" @default.
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