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191.
TheIsometryofRiemannianManifoldtoaSphereZhaoPeibiao(赵培标)(Dept.ofMath.,AnhuiInstituteofFinance&Trade,233041)Abstract:Inthispap... 相似文献
192.
193.
Miguel Ortega Juan de Dios Pérez Young Jin Suh 《Czechoslovak Mathematical Journal》2006,56(2):377-388
In this paper we classify real hypersurfaces with constant totally real bisectional curvature in a non flat complex space
form M
m
(c), c ≠ 0 as those which have constant holomorphic sectional curvature given in [6] and [13] or constant totally real sectional
curvature given in [11]. 相似文献
194.
ZHU Fuhai & LIANG KeSchool of Mathematical Sciences LMAM Peking University Beijing China College of Mathematical Sciences LPMC Nankai University Tianjin China 《中国科学A辑(英文版)》2004,47(2):264-271
We gave a complete list of totally geodesic submanifolds of maximal rank in symmetric spaces of noncompact type. The compact cases can be obtained by the duality. 相似文献
195.
Ning Xu 《中国科学A辑(英文版)》2009,52(1):66-76
In this paper, we give the definition of the height of a valuation and the definition of the big field Cp,G, where p is a prime and GR is an additive subgroup containing 1. We conclude that Cp,G is a field and Cp,G is algebraically closed. Based on this the author obtains the complete classification of valuations on arithmetic surfaces. Furthermore, for any m ≤n∈ Z, let Vm,n be an R-vector space of dimension n-m + 1, whose coordinates are indexed from m to n. We generalize the definition of Cp,G, where p i... 相似文献
196.
Let M be a concircularly fiat totally real minimal submanifold in CP4. The infimum Vm of the volume V (M) of M is obtained, also the necessary and sufficient conditions of "V(M)=Vm" is given. 相似文献
197.
P. Danchev 《Lithuanian Mathematical Journal》2006,46(2):146-149
It is proved that any Σ-group, which is a special elongation of a totally projective abelian p-group by a p
ω+1-projective abelian p-group, is totally projective. In particular, each p
ω+1-projective abelian Σ-p-group is a direct sum of countable p-groups of lengths not exceeding ω + 1. This strengthens our recent result published in Comment. Math. Univ. St. Pauli (2006).
Published in Lietuvos Matematikos Rinkinys, Vol. 46, No. 2, pp. 180–185, April–June, 2006. 相似文献
198.
Juan Jos Montellano‐Ballesteros 《Journal of Graph Theory》2006,51(3):225-243
Given an edge‐coloring of a graph G, a subgraph M of G will be called totally multicolored if no two edges of M receive the same color. Let h(G, K1,q) be the minimum integer such that every edge‐coloring of G using exactly h(G, K1,q) colors produces at least one totally multicolored copy of K1,q (the q‐star) in G. In this article, an upper bound of h(G, K1,q) is presented, as well as some applications of this upper bound. © 2005 Wiley Periodicals, Inc. 相似文献
199.
Camillo Costantini 《Mathematical Logic Quarterly》2007,53(6):551-557
We introduce a suitable notion of eight‐shaped curve in the product S × ? of a Suslin line S for the real line ?, and we prove that if S is dense in itself, then every collection of pairwise disjoint eight‐shaped curves in S × ? is countable. This parallels a folklore result which holds for the real plane. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
200.