Counting the solutions of lambda(1)x(1)(k1) + . . . + lambda(t)x(t)(kt) equivalent to c mod n

Counting the solutions of lambda(1)x(1)(k1) + . . . + lambda(t)x(t)(kt) equivalent to c mod n
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计算 lambda(1)x(1)(k1) 的解。

DOI:
10.1016/j.jnt.2017.10.017
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发表时间:
2018
影响因子:
0.7
通讯作者:
Ouyang Yi
Ouyang Yi
中科院分区:
数学3区
文献类型:
--
作者:
Li Songsong;Ouyang Yi

文献摘要

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给定一个多项式Q(x1,x1,xt)= λ 1 x1 k1 + λ t xt kt,对任意c∈ Z,n≥ 2,研究了同余方程Q(x1,x1,xt)<$cmod n在(Z/nZ)t中的解的个数NJ(Q; c,n),使得xi ∈(Z/nZ)×,其中i∈ J <$I={1,n,t}.对p为任意素数,a≥ 1为任意整数,本文给出了研究NJ(Q; c,pa)的公式和算法.作为主要结果的推广,我们完全解决了:Q(xi)=∑ i∈ I λ ixi对任意素数p和I的任意子集J的计数问题,Q(xi)=∑ i∈ I λ ixi 2对任意p和J在t= 2的情况下的计数问题,以及对任意p和J满足min ∞ {vp(λ i)}的一般情况下的计数问题|i∈ I}= min <${v p(λ i)|i∈ J};在t= 2的情况下,对任意p ∈ k和任意J,Q(xi)=∑ i∈ I λ i xik的计数问题,以及在t一般的情况下,对任意p ∈ k和J,满足min <${v p(λ i)|i∈ I}= min <${v p(λ i)|i∈ J}。
Given a polynomial Q (x 1,⋯, x t)= λ 1 x 1 k 1+⋯+ λ t x t k t, for every c∈ Z and n≥ 2, we study the number of solutions N J (Q; c, n) of the congruence equation Q (x 1,⋯, x t)≡ c mod n in (Z/n Z) t such that x i∈(Z/n Z)× for i∈ J⊆ I={1,⋯, t}. We deduce formulas and an algorithm to study N J (Q; c, p a) for p any prime number and a≥ 1 any integer. As consequences of our main results, we completely solve: the counting problem of Q (x i)=∑ i∈ I λ i x i for any prime p and any subset J of I; the counting problem of Q (x i)=∑ i∈ I λ i x i 2 in the case t= 2 for any p and J, and the case t general for any p and J satisfying min⁡{v p (λ i)| i∈ I}= min⁡{v p (λ i)| i∈ J}; the counting problem of Q (x i)=∑ i∈ I λ i x i k in the case t= 2 for any p∤ k and any J, and in the case t general for any p∤ k and J satisfying min⁡{v p (λ i)| i∈ I}= min⁡{v p (λ i)| i∈ J}.