全文获取类型
收费全文 | 183篇 |
免费 | 10篇 |
国内免费 | 19篇 |
专业分类
综合类 | 2篇 |
数学 | 123篇 |
综合类 | 87篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 11篇 |
2016年 | 2篇 |
2015年 | 4篇 |
2014年 | 6篇 |
2013年 | 26篇 |
2012年 | 6篇 |
2011年 | 16篇 |
2010年 | 5篇 |
2009年 | 10篇 |
2008年 | 8篇 |
2007年 | 14篇 |
2006年 | 10篇 |
2005年 | 14篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2002年 | 3篇 |
2001年 | 9篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 5篇 |
1997年 | 5篇 |
1996年 | 5篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1986年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有212条查询结果,搜索用时 15 毫秒
71.
假设群G的一个Sylowp-子群P的子群D满足1D≤P,p是G的素因子.利用P的每个阶为D子群在P的正规化子NG(P)中的M-可补性质,并结合H(P)={H≤P P′≤H≤Φ(P)}中子群的弱s-可补性质,得到了刻画p-幂零群和p-超可解群新的充分条件. 相似文献
72.
Let G be a finite group, and let p 1,…, p m be the distinct prime divisors of |G|. Given a sequence 𝒫 =P 1,…, P m , where P i is a Sylow p i -subgroup of G, and g ∈ G, denote by m 𝒫(g) the number of factorizations g = g 1…g m such that g i ∈ P i . Previously, it was shown that the properly normalized average of m 𝒫 over all 𝒫 is a complex character over G termed the Average Sylow Multiplicity Character. The present article identifies the kernel of this character as the subgroup of G consisting of all g ∈ G such that m 𝒫(gx) = m 𝒫(x) for all 𝒫 and all x ∈ G. This result implies a close connection between the kernel and the solvable radical of G. 相似文献
73.
Let G be a finite group, and let p1,…, pm be the distinct prime divisors of |G|. Given a sequence 𝒫 =P1,…, Pm, of Sylow pi-subgroups of G, and g ∈ G, denote by m𝒫(g) the number of factorizations g = g1…gm such that gi ∈ Pi. The properly normalized average of m𝒫 over all 𝒫 is a complex character over G whose kernel contains the solvable radical of G [7]. The present paper characterizes the solvable residual of G in terms of this character. 相似文献
74.
David E. Dobbs 《代数通讯》2013,41(6):2603-2623
An integer n is called catenarian if, whenever L/K is an n-dimensional field extension, all maximal chains of fields going from K to L have the same length. Catenarian field extensions and catenarian groups are defined analogously. If n is an even positive integer, 6n is non-catenarian. If n ≥ 3 is odd, there exist infinitely many odd primes p such that p 2 n is non-catenarian. A finite-dimensional field extension is catenarian iff its maximal separable subextension is. If q < p are odd primes where q divides p ? 1 (resp., q divides p + 1), every (resp., not every) group of order p 2 q is catenarian. 相似文献
75.
We study the connection between products of Sylow subgroups of a finite group G and the solvable residual of G. Let Π(𝒫) be a product of Sylow subgroups of G such that each prime divisor of |G| is represented exactly once in Π(𝒫). We prove that there exists a unique normal subgroup N of G which is minimal subject to the requirement Π(𝒫) N = G. Furthermore, N is perfect, and the product of all of these subgroups is the solvable residual of G. We also prove that the solvable residual of G is generated by all elements which arise from non-trivial factorizations of 1 G in such products of Sylow subgroups. 相似文献
76.
The normalizer of each Sylow subgroup of a finite group G has a nilpotent Hall supplement in G if and only if G is soluble and every tri-primary Hall subgroup H (if exists) of G satisfies either of the following two statements: (i) H has a nilpotent bi-primary Hall subgroup; (ii) Let π(H) = {p, q, r}. Then there exist Sylow p-, q-, r-subgroups H p , H q , and H r of H such that H q ? N H (H p ), H r ? N H (H q ), and H p ? N H (H r ). 相似文献
77.
A condition for the solvability of finite groups 总被引:1,自引:1,他引:0
A subgroup H is called ?-supplemented in a finite group G, if there exists a subgroup B of G such that G = HB and H 1 B is a proper subgroup of G for every maximal subgroup H 1 of H. We investigate the influence of ?-supplementation of Sylow subgroups and obtain a condition for solvability and p-supersolvability of finite groups. 相似文献
78.
《北京联合大学学报(自然科学版)》2012,26(1)
利用Sylow子群及其极大子群在有限群G中完全条件置换得出了G超可解的结论,并把结果推广到群系中,得到了包含超可解群类的饱和群系的充分条件,推广了一些已知结果。 相似文献
79.
The structure of a normal subgroupK of a finite groupG is studied under the condition that nontrivial intersections ofK with maximal subgroups ofG belong to an arbitrary formation with normalizer condition.
Translated fromMatematicheskie Zametki, Vol. 66, No. 6, pp. 867–870, December, 1999. 相似文献
80.