How many positive integral divisors of 27000 are not divisible by 30?27000有多少个正除数,同时不被30整除? 相关知识点: 试题来源: 解析 27000=2^3*3^3*5^330=2*3*530能整除27000,且27000/30=2^2*3^2*5^2既是27000的约数又能被30整除的正整数的个数其实就是(27000/30)的正约数个数所以满足...
We prove that if $m \ge n-3$ then every $S_m$-invariant F-nef divisor on the moduli space of stable $n$-pointed curves of genus zero is linearly equivalent to an effective combination of boundary divisors. As an application, we determine the Mori cone of the moduli spaces of stable...
A smooth scheme X over a field k of positive characteristic is said to be strongly liftable, if X and all prime divisors on X can be lifted simultaneously ... Q Xie - 《Journal of Algebra》 被引量: 33发表: 2009年 On the algebraic dimension of twistor spaces over the connected sum of...
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, what is the greatest possible total number of positive integral divisors of n2?( ) A. 23B. 24C. 33D. 45相关知识点: 试题来源: 解析 B 如果n的正整数因子的总数是12,n的平方正整数因子的最大可能总数是多少. 依题意得,因为n的平方=n×n=12个因数的积×12个因数的积,所以n的平方的因数的...
As an application, we determine the Mori cone of the moduli spaces of stable curves of small genus with few marked points.doi:10.1016/j.jpaa.2008.07.013Claudio FontanariJournal of Pure & Applied AlgebraClaudio Fontanari, Positive divisors on quotients of M 0,n and the Mori cone of M g,...
the number of different positive divisors of 12 & the number of different positive divisor of 50?哪个大?没有说是不是整数.. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 问题应该是12的正约数和50的正约数的个数,哪个大?12的正约数:1 2 3 4 6 12,计6个;50的正约数:1...
Let d(n)denote the number of positive divisors of positive integer n. For how many values of 0≤n≤10 is d(n!)a power of 2? A. 2 B. 4 C. 5 D. 6 E. 7 相关知识点: 试题来源: 解析 D 0!=1 yes1!=1 yes2!=2 yes3!=2×3 yes4!=2×3×4=23×3 yes5!=23×3×5...
The supersymmetric product of a supercurve is constructed with the aid of a theorem of algebraic invariants and the notion of positive relative superdivisor (supervortex) is introduced. A supercurve of positive superdivisors of degree 1 (supervortices of vortex number 1) of the original supercurv...
B. 20C. 38D. 39相关知识点: 试题来源: 解析 D The sum of the positive divisors of 18 is 1+2+3+6+9+18=39. 18的所有正整数因子的和是( ). A.18 B.20 C.38 D.39 18的所有正整数因子的和是1+2+3+6+9+18=39.反馈 收藏