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1.
In this article, by the algebraic method, the author proves the existence of a new nontrivial family of filtration s + 5 in the stable homotopy groups of spheres πrS,which is represented by 0 ≠γ^-s+3hnhm∈Ext^s+5,A ^t(Zp,Zp)in the Adams spectral sequence,where r=q(p^m+p^n+(s+3)p^2+(s+2)p+(s+1))-5,t=p^mq+p^nq+(s+3)p^2q+(s+2)pq+(s+1)q+s,p≥7,m≥n+2〉5,0≤s〈p-3,q=2(p-1).  相似文献   

2.
m分Cantor尘的Hausdorff测度   总被引:1,自引:0,他引:1  
为得到一类相似分形的Hausdorff测度准确值.给出了m分Cantor尘的几何结构,利用几何度量关系对m分Cantor尘的Hausdorff测度准确值进行研究.证明了m分Cantor尘的Hausdorff测度准确为H^s(E)=1/(m-1)^s[(m-2k+1)^2+(m-1)^2]^s/2,其中s=logm4,m≥4,1≤k≤m.结果表明它是Cantor尘和Sierpinski地毯的Hausdorff测度的准确值的推广,4分Cantor尘和4分Sierpinski地毯的Hausdorff测度的准确值是其特例.  相似文献   

3.
已知曲线Γ:r=r(s)的基本向量α、β、γ且曲率和挠率分别为κ、τ,本文研究了由α、β和γ所作出的曲线Γ:ρ=r+αa+b∫s0^s βds的曲率κ和挠率τ的计算问题。  相似文献   

4.
We prove that each sufficiently large odd integer N can be written as sum of the form N = p1^3 +p2^3 +... +p9^3 with [pj - (N/9)^1/31 ≤ N^(1/3)-θ, where pj, j = 1,2,...,9, are primes and θ = (1/51) -ε.  相似文献   

5.
Using least parameters, we expand the step-transition operator of any linear multi-step method (LMSM) up to O(τ^s+5) with order s = 1 and rewrite the expansion of the steptransition operator for s = 2 (obtained by the second author in a former paper). We prove that in the conjugate relation G3^λτ o G1^τ =G2^τ o G3^λτ with G1 being an LMSM,(1) theorder of G2 can not be higher than that of G1; (2) if G3 is also an LMSM and G2 is a symplectic B-series, then the orders of G1, G2 and G3 must be 2, 2 and 1 respectively.  相似文献   

6.
In this paper, we introduce a new concept -- overlarge sets of generalized Kirkman systems (OLGKS), research the relation between it and OLKTS, and obtain some new results for OLKTS. The main conclusion is: If there exist both an OLKF(6^k) and a 3-OLGKS(6^k-1,4) for all k ∈{6,7,...,40}/{8,17,21,22,25,26}, then there exists an OLKTS(v) for any v ≡ 3 (mod 6), v ≠ 21. As well, we obtain the following result: There exists an OLKTS(6u + 3) for u = 2^2n-1 - 1, 7^n, 31^n, 127^n, 4^r25^s, where n ≥ 1,r+s≥ 1.  相似文献   

7.
1.IntroductionThetwcawayerrorcomponentregressionmodelmsybeexpressedasif=o

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8.
设D=3a^2+1,P=4a^2+1是奇素数,其中a是正整数.本文证明了:当a〉6.10^18时,方程x^2+D^m=P^n恰有2组正整数解(x,m,n)=(a,1,1)和(8a^3+3a,1,3).  相似文献   

9.
程照  程煌 《数学通讯》2007,(3):47-47
题目 已知a1+a2+a3=4,b1+b2+b3=3,且a1,a2,a3,b1,b2,b3均为正数,试求√a1^2+b1^2+√a2^2+b2^2+√a3^2+b3^2的最小值。  相似文献   

10.
题目如图1,PA切⊙O于A,弦AB、AC交OP于M、N,BC交OP于Q,求证:〈1=〈2→←〈3=〈4. 证明 由题设得〈5=〈B,〈2=〈5+〈4,〈1=〈B+〈3, ∴〈1=〈2→←〈B+〈3=〈5+〈4→←〈3=〈4.  相似文献   

11.
In this paper we prove the existence and uniqueness of the solutions to the one-dimensional linear stochastic differential equation with Skorohod integral Xt(ω)=η(w)+∫^t 0 asXs(ω)dWs+∫^t 0 bsXs(ω)ds, t∈[0,1] where (Ws) is the canonical Wiener process defined on the standard Wiener space (W,H,u), a is non-smooth and adapted, but η and b may be anticipating to the filtration generated by (Ws). The intention of the paper is to eliminate the regularity of the diffusion coefficient a in the Malliavin sense, in the existing literature. The idea is to approach the non-smooth diffusion coefficient a by smooth ones.  相似文献   

12.
题目呈现 已知实数x,y适合2x^2+4xy+2y^2+3x^2y^2=9,又设z=√2(z+y)+3√3zy,则z的取值范围是( )  相似文献   

13.
徐加生 《数学通讯》2006,(11):11-12
(2006年江苏高考第21题)设数列{an},{bn},{Cn},满足:bn=an-an+2,Cn=an+2an+1+3an+2(n=1,2,3,…),证明{an}为等差数列的充分必要条件是{Cn}为等差数列且bn≤bn+1(n=1,2,3,…)  相似文献   

14.
定理 设数列{αn}是等差数列,sn=α1^m+α2^m+…+αn^m,m∈N^*,则存在λi∈R(i=2,3,…,m+1),有g(n)=λm+1αn^m+1+λmαn^m+…+λ3αn^3+λ2αn^2,使{sn-g(n)}为等差数列.  相似文献   

15.
题目 已知a〉0,b〉0,c〉0,a+b+c=1,证明:√3a+1+√3b+1+√3c+1≤3√2  相似文献   

16.
不等式中的一对姐妹花   总被引:4,自引:0,他引:4  
若a,b,c是正数,且a+b+c=1,则有(1/b+c -a)1/c+a-b)(1/a+b -c)≥(7/6)^3当且仅当a=b=c=1/3时取等号。  相似文献   

17.
Furuta showed that if A≥B≥0,then for each r≥0,f(p)=(A^r/2 B^p A^r/2)^t+r/p+r is decreasing for p≥t≥0.Using this result,the following inequality(C^r/2(AB^2A)^δC^ r/2)^ p-1+r/4δ+r ≤C^p-1+r is obtained for 0〈p ≤1,r≥1,1/4≤δ≤1 and three positive operators A, B, C satisfy(A^1/2BA^1/2)^p/2≤A^p,(B^1/2AB^1/2)^p/2≥B^p,(C^1/2AC^1/2)^p/2≤C^p,(A^1/2CA^1/2)^p/2≥A^p.  相似文献   

18.
文[1]对不等式“若xi〉0,i=1,2,3且∑i=1^3 xi=1,则1/1+x1^2+1/1+x2^2+1/1+x3^2≤27/10”给出了一个较为简单的证明.其证明思路是:先证明对任意0〈x〈1有1/1+x^2≤27/50(2-x),即(x-1/3)^2(x-4/3)≤0成立(这是显然的,且x=1/3时等号成立).  相似文献   

19.
一种有趣且有很长历史的数叫费马素数.这些数是由法国数学家费马提出的.最初的五个费马素数是 F0=2^2^0+1=3,F1=2^2^1+1=5,F2=2^2^2+1=17,F3=2^2^3+1=257,F4=2^2^4+1=65537.由这些数可以看出,  相似文献   

20.
有一道数学题,小学生都能明白其义,却难了世人两百多年,到现在还没有证明出来,那就是著名的“哥德巴赫猜想”:“任何一个不小于6的偶数都可以写成两个奇素数(素数又叫质数)之和.”如6=3+3,8=5+3,10=5+5,12=7+5等等,这个命题简称为“1+1”.  相似文献   

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