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切于已知球的单形宽度 总被引:3,自引:1,他引:2
Let w(△n) denote the width of a non-degenerate simplex △n in En and r(△n) denote the inradius of the simplex.Then, in this paper, we prove the ine-qunlity as below: Theorem:w(△n)≤βnr(△n) where βn =(n1/2(n+1))/([(n+1)/2]1/2(n+1-[(n+1)/2])1/2) The equality holds if and only if the simplex is regular. 相似文献
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设X为实一致光滑Banach空间,K为X的非空凸子集满足K+K?K.设T:K→K为有界φ-半压缩映象.设{vn}n=0∞,{vn}n=0∞为K中的序列,{αn}n=0∞,{βn}n=0∞为[0,1]中的实数列满足(?)若{Tyn相似文献
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我们讨论了如下形式的向量值连分式这里bn=(bn1,bn2,…,bnd)满足Samelson逆,而且an,bn1,bn2,…,bnd均为正.给出了形如(#)的向量值连分式收敛的充分和必要条件,同时给出了收敛时的截断误差估计. 相似文献
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关于Grünwald插值算子及其应用 总被引:6,自引:0,他引:6
本文研究了基于Jacobi多项式Jn(α,β)(x)(0<α,β<1)的零点{xk}ln的Grünwald插值多项式Gn(f;x)=(?)f(xk)lk2(x),证明了Gn(f;x)在(-1,1)内的任一闭子区间上一致收敛于连续函数f(x);从而拓广了Grünwald所得结果。 相似文献
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范畴RMnl上的一个函子 总被引:1,自引:1,他引:0
Let RMnl′ be a category which is equivalent to the category of left R-modules.In this paper,we define afunction F:RMnl→RMnl′ and prove that the functor Fpreserves products,direct limits,injections,surjectios and total esactness.Finally,we show that the functor F is a left-adjoint of the inclusion functor I:RMnl′→RMnl. Hence I:RMnl′ is a renective subcategory of RMnl. 相似文献
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右半平面内解析函数的准确零(R)级 总被引:6,自引:2,他引:4
Let f(s)=(?)ane-λm3(s=σ+it),0<λn↑+∞), where (?)(n/logU(λn))=E<+∞,(?)(log|αn|/λn)=0. 相似文献
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设{Xn, n ≥1}是独立同分布随机变量序列, Un 是以对称函数(x, y) 为核函数的U -统计量. 记Un =2/n(n-1)∑1≤i h(Xi, Xj), h1(x) =Eh(x, X2). 在一定条件下, 建立了∑n=2∞(logn)δ-1EUn2I {I U n |≥n 1/2√lognε}及∑n=3∞(loglognε)δ-1/logn EUn2 I {|U n|≥n1/2√log lognε} 的精确收敛速度. 相似文献
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When sample size is a sequence of r.v., the parametric estimates in linear models are interesting both theoretically and practically. For linear models Yi=xiβ+ei,i=1,2,…where {ei} are p-dimensional i .i .d.r.v′.s with Ee1=0. Var e1=σ2,0<σ2<∞. we consider estimate σ2(vn) of error variance σ2 and least squares estimate β(vn) of regression coefficient β, here {vn} is a sequence of r.v. with positve integers larger than P. In this paper some properties of estimates are discussed . Those are unbiasedness, consistency and normality . For σ2(vn), we also obtain some orders for convergence to normal distribution. 相似文献