The number of solutions of certain equations over a finite field
The number of solutions of certain equations over a finite field
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DOI:
10.1016/j.ffa.2004.06.004
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发表时间:
2005-04
期刊:
影响因子:
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通讯作者:
Wensong Wang;Sun Qi
中科院分区:
文献类型:
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作者:
Wensong Wang;Sun Qi
Let F be a finite field with q=pfelements, where p is a prime number. Let N(n)be the number of solutions (x1,…,xn) of the triangular equation [Formula: see text] in Fqn, where n⩾2,dij⩾0,ai∈Fq*and b∈Fq. In this paper, we obtain an explicit formula for the expression N(n)under the necessary restriction gcd(d11d22…dnn,q-1)=1. We also discuss the general case without the additional restriction by applying Jean Delsarte's method of character sum techniques (Nombre de solutions des équations polynomiales sur un corps fini, Séminaire Bourbaki, Exposé, 39:1C9, March 1951; An English summary available at: http://arxiv.org/PS_cache/math/pdf/0401/0401066.pdf).