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MATH 437/537 HOMEWORK 4
发布时间:2022-11-26
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HOMEWORK 4: DUE DECEMBER 5TH
MATH 437/537: PROF. DRAGOS GHIOCA
Problem 1 . (10 points.) Let α > 2 such that α e R - Q. Recalling the notation
[x] for the greatest integer less than or equal to the real number [x], then we define
S := {[n . α] : n e 勿}.
(i) Prove that for any integer m > 3, there exist m numbers contained in S which form an arithmetic progression.
(ii) Prove that there exist no infinite arithmetic progressions contained in S .
Problem 2. (5 points.) Let g e Q[x] be a polynomial of degree 2022 with rational coefficients. Prove that there exist infinitely many rational numbers q in the interval
(0, 1) with the property that
^5g(q) Q.
Problem 3. (10 points.) Let h(x) e 勿[x] be a non-constant irreducible polyno- mial. Prove that there exist infinitely many primes p with the property that for each such prime p, there exists a positive integer np such that
p I h(np ) but p2 | h(np ).
Problem 4 . (10 points.) Let f(x) e 勿[x] be a polynomial of degree m > 1 and let d e N be an integer which does not divide m. Then prove that there exist infinitely many positive integers n with the property that
^df(n) 勿.