We prove that, if 2 <= k(1) <= k(2), then there is no infinite sequence of positive integers such that the representation function r(n) = #{(a, a'): n = k(1)a + k(2)a', a, a' is an element of } is constant for n large enough. This result completes the previous work of Dirac and Moser for the special case k(1) = 1 and answers a question posed by Sarkozy and Sos.
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页码:274 / 280
页数:7
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