On the amplitude of intervals of natural
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Patrick Cégielski; François Heroult; Denis Richard
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Article
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2003
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Elsevier Science
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English
⚖ 203 KB
An interval [a; a + d] of natural numbers veriÿes the property of no coprimeness if and only if every element a + 1; a + 2; : : : ; a + d -1 has a common prime divisor with extremity a or a + d. We show the set of such a and the set of such d are recursive. The computation of the ÿrst d leads to ris