共查询到20条相似文献,搜索用时 15 毫秒
1.
Li Fang WANG Yan Ming WANG 《数学学报(英文版)》2007,23(11):1985-1990
Let З be a complete set of Sylow subgroups of a finite group G, that is, З contains exactly one and only one Sylow p-subgroup of G for each prime p. A subgroup of a finite group G is said to be З-permutable if it permutes with every member of З. Recently, using the Classification of Finite Simple Groups, Heliel, Li and Li proved tile following result:
If the cyclic subgroups of prime order or order 4 iif p = 2) of every member of З are З-permutable subgroups in G, then G is supersolvable.
In this paper, we give an elementary proof of this theorem and generalize it in terms of formation. 相似文献
2.
Siberian Mathematical Journal - Let π be a set of primes and let H be a π-prefrattini subgroup of a finite soluble group G. We prove that there exist elements x, y, z ∈ G such that... 相似文献
4.
Siberian Mathematical Journal - Given a nonempty set π of primes, call a nilpotent group π-bounded whenever it has a central series whose every factor F is such that: In every quotient... 相似文献
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ARemarkontheIntrinsicRigidityofCompactMinimalSubmanifoldsinASphere¥ShuShichang(舒世昌)(iaXingqin(贾兴琴)(XianyangTeachers'College,7... 相似文献
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Let X be a Complete metric space with distance function d, anp T a mapping from X into X. T is said to be a first type of the expansion mapping, if it satisfies the following condition 相似文献
9.
《应用数学》1991,(4)
1 Introduction Let G be a simple graph. An edge colouring ∏ of G is a map ∏: E(G)→{1,2,…} such that no two adjacent edges have the same image. The chromatic index X' (G) of G is the minimum cardinality of all possible images of colouring of G. By Vizing's theorem if △ is the maximum degree of G. 相似文献
10.
We establish new conditions for the completeness of systems of exponentials with weight in L
2(), which complement and generalize the results obtained earlier by the authors. 相似文献
11.
Ohad Giladi 《Set-Valued and Variational Analysis》2018,26(2):207-225
Using a known construction of a Lyapunov function, it is shown that the Douglas–Rachford iteration with respect to a sphere and a line in a Hilbert space converges to the intersection point in a fashion which is stronger than uniform convergence on compact sets. 相似文献
12.
In this paper we consider the Cauchy problem to the following semi-linear Schrdinger equation 相似文献
13.
In this paper, the authors prove that if Mn is a complete noncompact Kahler manifold with a pole p, and its holomorphic bisectional curvature is asymptotically non-negative to p, then it is a Stein manifold. 相似文献
14.
Piotr Jucha 《Journal of Geometric Analysis》2012,22(1):23-37
Let D be a Hartogs domain of the form \(D=\{(z,w)\in\mathbb{C}\times\mathbb{C}^{N}: \|w\| where u is a subharmonic function on ?. We prove that the Bergman space of holomorphic and square integrable functions on D is either trivial or infinite-dimensional. 相似文献
15.
Xiao Li FU Guo En HU Da Chun YANG 《数学学报(英文版)》2007,23(3):49-456
Let μ be a Radon measure on R^d which may be non-doubling. The only condition satisfied by μ is that μ(B(x,r)) ≤ Cr^n for all x∈R^d r 〉 0 and some fixed 0 〈 n ≤ d. In this paper, the authors prove that the boundedness from H^1(μ) into L^1,∞ (μ) of a singular integral operator T with Calderón-Zygmund kernel of HSrmander type implies its L^2(μ)-boundedness. 相似文献
16.
Lotfi Lassoued 《东北数学》1998,(2)
ARemarkontheWeakTopologyandtheDegreeLotfiLassoued(Laboratoired'AnalyseNumériqueUniversitéPierreetMarieCurie4,placeJusieu,7525... 相似文献
17.
LetRbeassociativewithanidentity.RingRiscalledaπ-regularringifandonlyifforeveryelementainR,thereexistsomen1,c∈Rsuchthatan=ancan.RingRiscalledaunitπ-regularringifandonlyifforanyelementainR,thereissomem1suchthatam=amuamforaunitu∈R.Manyringsareunitπ-regularrings,suchassemicommutativeπ-regularrings,finitesemicommutativerings,stronglyπ-regularringsandunit-regularrings.Risstronglyπ-regularifforeverya∈Rthereexistn1andc∈Rsuchthatan=an 1c.Ifthein-dexnaboveisoneforalla∈R,thenRiscalledabel… 相似文献
18.
Cesare Parenti 《偏微分方程通讯》2013,38(7):1071-1084
A sufficient condition is given in order to ensure the Hörmander inequality for a (formally) self-adjoint transversally elliptic pseudodifferential operator P in the case of the symplectic form changing rank on the characteristic manifold. 相似文献
19.
We establish conditions for the existence of a solution of the interpolation problem f(
n
) = b
n in the class of functions f analytic in the unit disk and such that
Here, : [1; +) (0; +) is an increasing function convex with respect to lnt on the interval [1; +) and such that lnt = o((t)), t . 相似文献
0} \right)\;\left( {\forall z,\;|\;z\;| < 1} \right):\;\;\left| {f\left( z \right)} \right|\;\; \leqslant \;\;\;\exp \left( {c_1 \eta \left( {\frac{{c_1 }}{{1 - \left| z \right|}}} \right)} \right).$$ " align="middle" vspace="20%" border="0"> |
20.
Let
be a polynomial with complex coefficients and define, for
,
where ||P|| is the euclidean norm of the polynomial P. By a theorem of Szegö
where
is the Mahler measure of F. Recently, J. Dégot proved an effective version of this result. In this paper we sharpen Dégot's result, under the additional hypotheses that F is a square-free polynomial with integer coefficients and without reciprocal factors. 相似文献