...， 对所有a b c F , , ? ，a b c a b a c ? ? ? ? ? ? ( ) 若一个场中的元素个数为无限多个则称为无限场(infinite field)；反之， 称为有限场(finite field)，密码理论应用中常用到有限场 无限场的例子有：实数场R、有理数场Q、复数场C 等 有限场的例子...
This paper gives a constructive proof of existence of period of polynomials infinitefield. Using it we can also find the period of polynomials.
本文给出有限域上多项式周期存在的构造性证明，利用它可求出多项式的周期。
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The first is establishing artificial boundary problem, because of simulating the infinitefield from the finite field in which intercept from the infinitefield, so we introduce artificial boundary.