On the p-adic denseness of the quotient set of a polynomial image

被引:8
|
作者
Miska, Piotr [1 ]
Murru, Nadir [2 ]
Sanna, Carlo [2 ]
机构
[1] Jagiellonian Univ, Fac Math & Comp Sci, Krakow, Poland
[2] Univ Torino, Dept Math, Turin, Italy
关键词
Denseness; p-adic numbers; Polynomials; Quotient set; Sum of powers;
D O I
10.1016/j.jnt.2018.08.010
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The quotient set, or ratio set, of a set of integers A is defined as R(A) := {a/b : a,b is an element of A, b not equal 0}. We consider the case in which A is the image of Z(+) under a polynomial f is an element of Z[X], and we give some conditions under which R(A) is dense in Q(p) . Then, we apply these results to determine when R(S-m(n)) is dense in Q(p), where S-m(n) is the set of numbers of the form x(1)(n) + . . . + x(m)(n), with x(1), . . . , x(m )>= 0 integers. This allows us to answer a question posed in Garcia et al. (2017) [5]. We end leaving an open question. (C) 2018 Elsevier Inc. All rights reserved.
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页码:218 / 227
页数:10
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