共查询到20条相似文献,搜索用时 15 毫秒
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罗家贵 《数学年刊A辑(中文版)》2021,42(4):359-378
本文讨论了Michael Bennett [Bennett M, Bugeaud Y, Mignotte M. Perfect powers with few binary digits and related Diophantine problem [J]. Ann Sc Norm Super Pisa Cl Sci, 2013,XII:941–953.]中提出的一类丢番图方程, 即五次完全幂的少位数三进制展开. 作者证明了丢番图方程 3a + 3b + 2 = n5, a > b > 0 有唯一的正整数解$(a,b,n)=(3,1,2). 相似文献
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Let T be a bounded linear operator on a complex Hilbert space H. In this paper we introduce a new class denoted by l-*-A, of operators satisfying T*|T2|T≥ T*|T*|2T, and we prove the basic properties of these operators. Using these results, we also prove that if T or T* ∈l-*-A, then w(f(T)) = f(w(T)), σea(f(T)) = f(σea(T)) for every f C H(σ(T)), where g(σ(T)) denotes the set of all analytic functions on an open neighborhood of σ(T). 相似文献
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In this paper, we shall introduce the concepts of fuzzy prime ideal, fuzzy Stone space, fuzzy fundamental set, etc. And the representations of a distributive lattice with 0, 1 (D_(01) denotes the equational class of such lattices) by fuzzy sets will be investigated and many useful results are obtained. 相似文献
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本文在Bergman空间Bqp(01)中研究关于旋转连续模的Hardy Littlewood逆定理,在通常条件下,得到了与在空间Hp(0
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Houmem Belkhechine Imed Boudabbous Kaouthar Hzami 《Comptes Rendus Mathematique》2013,351(13-14):501-504
We consider a tournament . For , the subtournament of T induced by X is . An interval of T is a subset X of V such that, for and , if and only if . The trivial intervals of T are ?, and V. A tournament is indecomposable if all its intervals are trivial. For , denotes the unique indecomposable tournament defined on such that is the usual total order. Given an indecomposable tournament T, denotes the set of such that there is satisfying and is isomorphic to . Latka [6] characterized the indecomposable tournaments T such that . The authors [1] proved that if , then . In this note, we characterize the indecomposable tournaments T such that . 相似文献
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脑算是珠算技术的一项基本功,在我们日常生活、学习、工作中也有着广泛的应用。一般而言三位乘三位的珠脑结合算法是把复杂的珠算运算过程,通过算理导入脑算,从而简化了珠算过程,使运算速度大大提高。为此,下面谈谈三位乘三位的珠脑结合算法。 相似文献
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I_(01)逼近定理的另一证明 总被引:1,自引:0,他引:1
最近,王振宇讨论了多项式的0,1系数逼近(简称I_(01)逼近)问题,用其结果研究多项式计算中的系数舍入问题,提出了一个新的、较简单的系数舍入方法,证明了该方法使用方便并且误差小,[1]中关于I_(01)逼近定理的证明篇幅很长,我发现若采用阿贝尔变换, 相似文献
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如果两个图形对应点的连线或其延长线交于一点,那么这两个图形就是位似图形,交点称为位似中心.位似的两个图形也是相似图形,具有相似图形的一切性质,如对应角相等,对应边成比例等.位似图形还有自己独特的性质,即对应点的连线或其延长线交于一点,对应线段平行或在同一直线上,据此可以画一个图形的位似图形,位似中心可选择平面内任一点,可以在图形的内部、边上或外部,画出的位似图形可以在位似中心的两侧,也可以在位似中心的同侧.近几年来,位似图形已不局限于作图,更多地与函数、作图形内的内接图形、点的坐标或位似判定相结合等,以下做一探析,供参考. 相似文献
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Qing MENG 《Frontiers of Mathematics in China》2020,15(2):385-398
We introduce and study property T and strong property T for unital*-homomorphisms between two unital C^*-algebras.We also consider the relations between property T and invariant subspaces for some canonical unital^-representations.As a corollary,we show that when G is a discrete group,G is finite if and only if G is amenable and the inclusion map i:Cr^*(G)→B(l^2(G))has property T.We also give some new equivalent forms of property T for countable discrete groups and strong property T for unital C^*-algebras. 相似文献