sum SUM =surface-to-underwater missile 舰对水下导弹[飞弹]。 n. 1.总数,总计,总额;【数学】和。 2.〔the sum〕概略,大要,要点。 3.款项,金额。 4.算术(题);运算,计算。 5.【诗】顶点,绝顶,极点。 sum remainder, product, quotient 和,差,积,商。 a sum total 总计,合计。 the sum of his opinions 他的意见的要点。 a good [considerable, round] sum一大[整]笔钱。 a large [small] sum of 巨[小]额的,大[小]量的。 be good at sums 算术好。 do [work, make] a sum(s) 计算,做算术题。 in sum大体上,一言以蔽之,总之。 the sum (and substance) 要点。 the sum of things (最高的)公共利益;宇宙。 vt. (-mm-) 合计,总计;总结,总括,概括。 vi. 总计(into, to);(法官听原告、被告陈述后)概括要点 (up)。 Contributions sums to several thousand dollars. 捐款总计达数千美元。 sum up 总计,总结;总起来说。 sum up experiences 总结经验。
Some exponential sums over primes in an arithmetic progression 算术级数中的一个指数和估计
By making use of two kinds of exponential sums and cohen ' s sieve , we better the lower bound concerning the number of primitive elements and also prove the existence of primitive polynomials with a1 , a2 prescribed when n = 5 , 6 . in the remaining of the paper we study primitive elements in the form of a + a - 1 over finite fields . a counting formula is given as a result , as well as all the finite fields that do not have such elements 本文对n = 5 , 6两种情形,利用有限域上的两类特征和估计及cohen筛法[ 5 ] [ 7 ] ,改进了[ 10 ] [ 11 ]中关于方程组本原元解个数的下界,并得到在特征为奇的有限域上存在可预先指定前两项系数的n次本原多项式。
百科解释
In mathematics, an exponential sum may be a finite Fourier series (i.e.