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本文利用G.M.Reed构造的Moore机器证明了:(1)Moore空间中的弱Lindelof住严格介于CCC与DCCC之间.(2)强星可遮的Moors空间不必是星仿紧的. 相似文献
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第一课 正弦和余弦(一)一、启发提问1.如图6-1,在△ABC中,∠C=90°.(1)如果∠A=30°,则ac=,bc=.(2)如果c=2a,则∠A=,∠B=.图6-1 图6-2 2.如图6-2,在△ABC中,∠C=90°.(1)如果∠A=45°,则ac=,bc=.(2)如果a=b,则∠A=,∠B=.3.在Rt△ABC和Rt△A′B′C′中:∠C=∠C′=90°.(1)如果∠A=∠A′,那么:BCAB=B′C′A′B′成立吗?(2)如果BCAB=B′C′A′B′,那么:∠A=∠A′… 相似文献
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CoincidencePointsandCommonFixedPointsforCompatibleMapsofType(A)onSaksSpacesP.P.Murthy,B.K.Shartria,Y.J.ChoCoincidencePointsan... 相似文献
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1两道联赛题 例 1 给定一圆内接△ABC,设 A'B'和C'分别是连结A'C'A'B'分别交AB、AC于D、E.求证:DE//BC,且DE经过△ABC的内心. 这是全俄第五届(1965年)数学竞赛的一道试题[1],现给一简明的证法如下. 证明 连结 A'B、BC',设F是BC与A'C'的交点,如图1.A'B=A'I.同理 C'B=C'I, A'C是线段BI的中垂线. BI平分 B, BI是DF的垂直平分线, DBFI是菱形, DI//BF,即 DI//BC. 同理可证 IE//BC, 故 DE//BC,且DE过△ABC的内… 相似文献
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本文利用P.S.Bullen和S.N.Mukaopadhyay在[1]中建立了SCP—积分的分部积分公式给出了SCP-Fourier级数的概念,并讨论了SCP-Fourier级数的系数问题。 相似文献
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Marilyn Breen 《Geometriae Dedicata》1998,71(2):111-117
For a family C of nonempty compact sets in the plane, the following conditions are equivalent:(1) Every two (not necessarily distinct) members of C have a connected union and every three (not necessarily distinct) members of C have a simply connected union.(2) C is a family of simply connected sets such that every two (not necessarily distinct) members of C have a connected intersection and every three (not necessarily distinct) members of C have a nonempty intersection.If either set of conditions is satisfied, then { C : C in C } is nonempty, simply connected, and connected. Furthermore, if the collection C is finite, then it is also true that { C : C in C } is simply connected. 相似文献
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本文研究Pontrjagin空间上一般算子代数弱闭和一致闭的等价条件,得到定理:设C0(U),C1(U,L,R,D,V),C2a(U),C2b(U,R),C3a(U),C3b(U,R)分别是Ⅱk空间上第0,Ⅰ,Ⅱa,Ⅱb,Ⅲa和Ⅲb类的算子代数,则(1)C0(U),C2a(U)或C3a(U)为一致闭(弱闭)的等价条件是U是Hibert空间G上的C*-代数(W*-代数;(2)C1(U,L,R,D,V)为一致闭(弱闭)的等价条件是U是Hibert空间H上的C*-代数(W*-代数),并且R是闭子空间,V是闭算子,L对称闭的;(3)C2b(U,R)或C3b(U,R)为一致闭(弱闭)的等价条件是U是Hibert空间H上的C*-代数(W*-代数),并且R是闭子空间. 相似文献
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郑乃峰 《纯粹数学与应用数学》2013,(1):11-18
设H为弱Hopf代数,C为弱右H-模余代数,令C=C/C·ker L.利用Smash余积来研究弱模余代数上的结构定理,并给出了C与C×H作为余代数同构的条件. 相似文献
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For the affine distance d(C,D) between two convex bodies C, D(?) Rn, which reduces to the Banach-Mazur distance for symmetric convex bodies, the bounds of d(C, D) have been studied for many years. Some well known estimates for the upper-bounds are as follows: F. John proved d(C, D) < n1/2 if one is an ellipsoid and another is symmetric, d(C, D) < n if both are symmetric, and from F. John's result and d(C1,C2) < d(C1,C3)d(C2,C3) one has d(C,D) < n2 for general convex bodies; M. Lassak proved d(C, D) < (2n - 1) if one of them is symmetric. In this paper we get an estimate which includes all the results above as special cases and refines some of them in terms of measures of asymmetry for convex bodies. 相似文献
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心理状态数的Bayes估计 总被引:4,自引:0,他引:4
设误差 X在心理状态数的作用下的分布为偏正态分布 ,即 X有密度f ( x;σ2 ,C) =C2πσe-x22σ2 x 02 - C2πσe-x22σ2 x >0其中 0 C 2为心理状态数 ,σ>0为未知参数 ,本文分别在 C服从 [C1,C2 ]上的均匀分布 ,Jeffreys无信息先验分布和共轭先验分布的假设下 ,得到了心理状态数 C的 Bayes估计。 相似文献
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设f:V(G)∪E(G)→{1,2,…,k}是简单图G的一个正常k-全染色.令C(f,u)={f(e):e∈N_e(u)},C[f,u]=C(f,u)∪{f(u)},C_2[f,u]=C(f,u)∪{f(x):x∈N(u)}∪{f(u)}.N(u)表示顶点u的邻集,N_e(u)表示与顶点u的相关联的边的集合.令C[f;x]={C(f,x);C[f,x];C_2[f,x]},对任意的xy∈E(G),G[f;x]≠C[f;y]表示C(f,x)≠C(f,y),C[f,x]≠C[f,y],C_2[f,x]≠C_3[f,y]同时成立.对任意的边xy∈E(G),如果有C[f;x]≠C[f;y]成立,则称f是图G的一个k-(3)-邻点可区别全染色(简记为(3)-AVDTC).图G的(3)-邻点可区别全染色中最小的颜色数叫做G的(3)-邻点可区别全色数,记为x_((3)as)″(G).研究了联图,完全二部图的(3)-邻点可区别全染色,得到了它们的(3)-邻点可区别全色数. 相似文献
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本文定义了环F2+uF2+vF2到域F2的广义Gray映射φ像,研究了环F2+uF2+vF2上线性码的广义Gray像.利用广义Gray映射φ的线性性,证明了环F2+uF2+vF2上线性码C的广义Gray像φ(C)满足dH(C)=dH(φ(C))且φ(C⊥)φ(C)⊥.同时,给出了F2+uF2+vF2上循环码C的广义Gray像φ(C)为F2上的4-拟循环码. 相似文献
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《Optimization》2012,61(2):127-143
In this article, we investigate the point-based set-valued approximation [H. Xu (1999). Set-valued approximation and Newton's methods. Mathematical Programming , 84 , 401-420.] and the C -differential operator [L. Qi (1996). C -Differential operators, C -differentiability and generalized Newton methods, Applied Mathematics Report, AMR96/5, School of Mathematics, The University of New South Wales, Sydney, Australia.] of a vector valued function. Several questions about C -differential operators posed in [L. Qi (1996). C -Differential operators, C -differentiability and generalized Newton methods, Applied Mathematics Report, AMR96/5, School of Mathematics, The University of New South Wales, Sydney, Australia.] are answered. Further, we discuss the application of C -differential operator in nonsmooth optimization. We derive optimality conditions and establish a mean value theorem in terms of convex C -differential operators. Finally, we propose a conceptual algorithm based on the convex C -differential operators. 相似文献
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文中得到半线性椭圆型方程的爆破问题解的存在性,其中或者是Rn中的有界区域,C3,C4,C5,C6是正常数,并且C5,C3(0,1). 相似文献