共查询到20条相似文献,搜索用时 62 毫秒
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LinYingjian 《数学研究》1994,27(1):116-120
This proper gives a constructive proof of Kubota‘s result that his AD-integral is more general than Burkill‘a AP-integral. 相似文献
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ZhangXiaodong LiJiongsheng WangPing 《高校应用数学学报(英文版)》1999,14(2):197-202
The Merris‘ conjectures for threshold graphs and d-regular graphs are proved. Andthe one of the conjectures of Merris holds for trees is also proved. 相似文献
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FENGCHAOKENG HSULIZHI YUHONGQUAN 《高校应用数学学报(英文版)》1995,10(1):35-38
This note shows that fur a BVP of Poisson‘s equation with Qm(u,v) as its source function, a direct evaluation of some integrals yields the same exact results as obtained by similarity analysis. 相似文献
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A SIMPLIFIED BRAUER'S THEOREM ON MATRIX EIGENVALUES 总被引:1,自引:0,他引:1
Luoluo Li 《高校应用数学学报(英文版)》1999,14(3):259-264
Let A=(a
ij)∈C
n×n
and
. Suppose that for each row of A there is at least one nonzero off-diagonal entry. It is proved that all eigenvalues of A are contained in
. The result reduces the number of ovals in original Brauer’s theorem in many cases. Eigenvalues (and associated eigenvectors)
that locate in the boundary of
are discussed.
The project is supported in part by Natural Science Foundation of Guangdong. 相似文献
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In this note, we will prove a Kahler version of Cheeger-Gromoll-Perelman's soul theorem, only assuming the sectional curvature is nonnegative and bisectional curvature is positive at one point. 相似文献
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Chen Zhijie 《数学年刊B辑(英文版)》1994,15(2):157-164
ANOTEONTHERELATIVECANONICALIMAGEOFANON-HYPERELLIPTICFIBRATIONOFGENUS4¥CHENZHIJIEAbstract:Thispaperinvestigatestherelative1-ca... 相似文献
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LI JUNJIE 《高校应用数学学报(英文版)》1994,9(1):55-64
ANOTEONREGULARITYANDEXISTENCEOFSOLUTIONSFORACLASSOFNON-UNIFORMLYDEGENERATEELLIPTICEQUATIONS¥LIJUNJIE(Dept.ofMath.,ZhejiangUni... 相似文献
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本文研究了Je(s)manowicz于1956年提出的关于丢番图方程(1.1)解的猜想.利用数论中的一些方法,得到了丢番图方程(1.2)的所有正整数解,证明了Je(s)manowicz猜想在这类情况下的正确性. 相似文献
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正规六边形和更广泛具有正规结构的Banach 空间 总被引:1,自引:1,他引:0
假设X是一个实Banach空间,S(X)是单位球面。作者引进了一个新的几何参数(H(X),讨论了H(X)和Neumann-Jordan常数CNJ(X)R 性质以及H(X)和其他几何常数的关系,本文主要结果是:H(X)〈2或CNJ(X)〈4/5一致正规结构。 相似文献
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本文的主要目的是利用三次特征的性质,以及W.Duke,H.Iwaniec,B.J Birch等人的重要工作来研究广义Kloosterman和的高次均值,并给出一些有趣的计算公式. 相似文献
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ANOTEONRECURRENTSETS¥WENZHIYING;WULIMING;ZHONGHONGLIU(DepartmeDtofMathematics,WuhanUniversitysWuhan430072,China.)Abstract:The... 相似文献
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《Quaestiones Mathematicae》2013,36(4):399-408
Abstract Let A be a unitary Banach algebra and let B be a closed subalgebra of A that contains the unit. For an element of B we show in this note how both the singular and exponential spectrum depends on the algebra. 相似文献
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The shape-from-moments problem is to reconstruct a planar polygon from a set of its complex moments. To reconstruct a polygon means to estimate the vertices and the ordering of the vertices. We notice that some coefficients are very important in finding out the ordering of the vertices. We introduce sensitive factors for the coefficients and use it to analyze sensitivity. These factors are also useful for the sensitivity of the vertices. 相似文献
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设X是一个紧致度量空间,f X→X是一个连续映射.若存在f的一个m-周期点p和另一个m'-周期点q(p≠q),使得对任意非空开集V(C)X,都有{p,q}(C)∞ Un=0fn(V),则称动力系统(X,f)是一个(m,m')型周期吸附系统.证明了:1)若(X,f)是一个(m,m')型周期吸附系统且X是自密的,则对任一给定的正整数k,存在一个fk的的分布混沌集S,使得S与X的任一非空开集之交均含有一个Cantor集;2)若(X,f)是一个(m,m')型周期吸附系统且拓扑共轭于(X ',f'),则(X ',f')也是一个(m,m')型周期吸附系统.改进和推广了已有结果. 相似文献
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本文将证明:对于,以及,积域上Marcinkiewicz积分算子为有界,其中1
相似文献