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SUMMARY:Ruofan Li (South China University of Technology)
DTSTART:20220712T123000Z
DTEND:20220712T133000Z
DTSTAMP:20260423T035957Z
UID:OWNS/91
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/OWNS/91/">Ra
 tional numbers in $\\times b$-invariant sets</a>\nby Ruofan Li (South Chin
 a University of Technology) as part of One World Numeration seminar\n\n\nA
 bstract\nLet $b \\ge 2$ be an integer and $S$ be a finite non-empty set of
  primes not containing divisors of $b$. For any $\\times b$-invariant\, no
 n-dense subset $A$ of $[0\,1)$\, we prove the finiteness of rational numbe
 rs in $A$ whose denominators can only be divided by primes in $S$. A quant
 itative result on the largest prime divisors of the denominators of ration
 al numbers in $A$ is also obtained. \nThis is joint work with Bing Li and 
 Yufeng Wu.\n
LOCATION:https://researchseminars.org/talk/OWNS/91/
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