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About: First-order reduction     Goto   Sponge   NotDistinct   Permalink

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In computer science, a first-order reduction is a very strong type of reduction between two computational problems in computational complexity theory. A first-order reduction is a reduction where each component is restricted to be in the class FO of problems calculable in first-order logic. Since we have , the first-order reductions are stronger reductions than the logspace reductions.