共查询到20条相似文献,搜索用时 797 毫秒
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本文讨论有限域F_(q~2)上的酉群U_n(F_(q~2))在酉几何V_n(F_(q~2))中的(s+1,1)型子空间可迁集上的次轨道,给出关于轨道数和每个次轨道长的计数公式. 相似文献
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二次域Q(√3)的单位给出的两个递归数列中的三角数问题 总被引:1,自引:0,他引:1
对二次域Q(√3)中单位Vn Un√3=(2 √3)n所给出的两个递归数列{Vn},{Un}中的三角数问题进行研究,给出了完整的结果.作为应用,解决了与其相关的两个不定方程问题. 相似文献
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设E是实的一致凸Banach空间,K是E的一个非空闭凸集,P是E到K上的非扩张的保核收缩映射.设T1,T2,T3:K→E分别是具有数列{hn},{ln},{kn}[1,∞)的渐近非扩张非自映射,使得sum (hn-1) from n=1 to ∞<∞,sum ((ln-1)) from n=1 to ∞<∞及sum (n=1(kn-1) from n=1 to ∞<∞,且F=F(T1)∩F(T2)∩F(T3)={x∈K:T1x=T2x=T3x}≠Ф.定义迭代序列{xn}:x1∈K,xn+1=P((1-αn)xn+αnT1(PT1)n-1yn),yn=P((1-βn)xn+βnT2(PT2)n-1zn),zn=P((1-γn)xn+γnT3(PT3)n-1xn),其中{αn},{βn},{γn}[ε,1-ε],ε是大于零的实数.(i)如果T1,T2,T3中有一个是全连续的或者半紧的,则{xn}强收敛于某一点q∈F;(ii)如果E具有Frechet可微范数或者满足Opial’s条件或者E的对偶空间E~*具有Kadec-Klee性质,则{xn}弱收敛于某一点q∈F. 相似文献
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The objective of this paper is to study the oscillatory and asymptotic properties of the mixed type third order neutral difference equation of the form △(an△2(xn+bnxn-τ1+cnxn+τ2))+qnxβn+1-σ1+pnxβn+1+σ2=0,where{an},{bn},{cn},{qn}and{pn} are positive real sequences,β is a ratio of odd positive integers,τ1,τ2,σ1 and σ2 are positive integers.We establish some sufficient conditions which ensure that all solutions are either oscillatory or converges to zero.Some examples are presented to illustrate the main results. 相似文献
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令R_k=(ak00bk)为正整数扩张矩阵,D_k={0,1,…,q_k-1}v_1+{0,1,…,q_k-1}v_2,其中v_1=(1,0)~t,v_2=(0,1)~t,q_k1为正整数.本文研究由{R_k}_(k=1)~∞和{D_}_(k=1)~∞生成的Moran测度μ{R_k},{D_k} :=δ_(R1)(-1)~D_1*δ(R_2R_1)~(-1)D_2*···*δ(R_K···R_2R_1)(-1)D_K*···的谱性,证明了当q_k|a_k且q_k|b_k时,μ{R_k},{D_k}为谱测度.这推广了文献[J.Funct,Anal.,2014,266(1):343-354]和[J.Funct.Anal.,2002,193(2):409-420]中的结论. 相似文献
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设P1,我们将n阶酉群上P次可积函数的全体记为L~p(U_n)。当f(U)∈L~p(U_n)时,U_n上的Fejer算子可表示为(见〔1〕): F_N(f;U)=1/(B_N(N+1)~(n~2))U_n f(VU)│det(I-V~(N+1)/det(I-V)│~2nV这里B_N由F_N(1;U)≡1所确定。 在〔1〕中,已对上述Fejer算子作了许多细致的研究,从Fourier级数求和法的观点计算了Fejer求和的系数,并且给出了Fejer算子逼近U_n 上连续函数的阶的估计。 本文主要是从U_n上的极大Fejer算子的弱型不等式出发,给出了U_n上Fejer算子对于L~p(U_n)类函数的几乎处处收敛性的结果。 相似文献
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在学习集合这一节时 ,老师布置了这样一道作业题 :“求集合 {1,2 ,3,4 }的所有非空子集的元素之和 .”当时我是这样做的 :先写出集合 {1,2 ,3,4 }的所有非空子集 :{1},{2 },{3},{4},{1,2 },{1,3},{1,4 },{2 ,3},{2 ,4 },{3,4 },{1,2 ,3},{1,2 ,4 },{1,3,4 },{2 ,3,4 },{1,2 ,3,4 }.然后再求出它们所有元素的和 :( 1 2 3 4 ) [( 1 2 ) ( 1 3) ( 1 4 ) ( 2 3) ( 2 4 ) ( 3 4 ) ] [( 1 2 3) ( 1 2 4 ) ( 1 3 4 ) ( 2 3 4 ) ] ( 1 2 3 4 ) =80 .做完这道题后 ,我考虑能否解决一般的问题 ,即“求… 相似文献
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The relationship between the crystallinity of poly (vinylidene fluoride) (PVDF) and electron radiation effects is studied
with differential scanning calorimeter and X-ray diffraction. The form of crystal of PVDF is not changed. In the low dose
zone (lower than 400 kGy), the crystallinity of PVDF increases slightly with the increase of absorbed dose, and then decreases
slowly, whereas the decrease of the crystallinity is accelerated with the increase of the absorbed dose in high dose zone.
Gel and Sol properties of irradiated samples of PVDF are also studied with extraction of N, N-dimethyl formamide. In a low
dose range, it fits Charlesby-Pinner formula very well; however, with the increase of the dose, it begins to deviate from
this formula because of the obstruction of the crystalline region of PVDF. 相似文献
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Aequationes mathematicae - 相似文献
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In this paper,the Jacobson radical of (R[G])G, the fixed point subring of a group ring (R[G]) is studied. Some related properties of (R[G])G are discussed. 相似文献
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