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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Characterizations of Separably Differentially Closed Fields
可分 微分闭域 微分场
2023/11/7
In this talk, we define a new class of differential fields called separably differentially closed fields and show their several characterizations by comparing them with differentially closed fields of...
Closed-loop convex analysis of performance limits for linear control systems
Linear control system computer aided control system and design a linear controller convex optimization digital signal processor
2015/8/12
In closed-loop convex analysis and design, the linear controller design problem is reformulated as a convex optimization problem, which may be more easily solved than the problems resulting from conve...
A characterization of normal subgroups via n-closed sets
subgroup normal subgroup left coset n-closed set
2011/9/20
Abstract: Let (G, *) be a semigroup, D subset of G, and n >= 2 be an integer. We say that (D, *) is an n-closed subset of G if a_1* ... *a_n in D for every a_1, ..., a_n in D. Hence every closed set i...
Closed-set-based Discovery of Representative Association Rules Revisited
Closed-set-based Discovery Representative Association Rules Revisited
2011/3/2
The output of an association rule miner is often huge in practice.This is why several concise lossless representations have been proposed, such as the “essential” or “representative” rules.
We show that every closed Lorentzian surface contains at least two closed geodesics. Explicit examples show the optimality of this claim. Refining this result we relate the least number of closed geo...
Minimal immersions of closed surfaces in hyperbolic three-manifolds
Minimal immersions closed surfaces in hyperbolic three-manifolds
2010/11/11
We study minimal immersions of closed surfaces (of genus $g \ge 2$) in hyperbolic 3-manifolds, with prescribed data $(\sigma, t\alpha)$, where $\sigma$ is a conformal structure on a topological surfac...
Closed nodal surfaces for simply connected domains in higher dimensions
Laplacian eigenfunction nodal domain
2010/12/1
We give an example of a domain in dimension N 3, homeomorphic to a ball and with analytic boundary, for which the second eigenvalue of the Dirichlet Laplacian has an eigenfunction with a closed noda...
Minimal infinite submodule-closed subcategories
Minimal infinite bmodule-closed subcategories
2010/11/30
Let be an artin algebra. We are going to consider full subcategories of mod closed under finite direct sums and under submodules with infinitely many isomorphism classes of indecomposable modules. ...
on bi—closed subbands of a band and free idem potent sem irings
semigroup idempotent semiring band bi—closed subband
2009/10/29
The bi—closed subbands of a band are introduced and its som e properties and characterizations are given．By using these results，the free object in the variety of idempotent semiringswhose additive red...
Closed surfaces with bounds on their Willmore energy
Willmore energy conformal parametrization geometric measure theory
2010/12/14
The Willmore energy of a closed surface in Rn is the integral of its squared mean curvature, and is invariant under M¨obius transformations of Rn. We show that any torus in R3 with energy at most 8π &...
The Existence of Maximal $W^*$-Closed Submodules in Nest Algebra Modules
Finite-partition submodule Finite Finite rank operator $w^{*}$-closure
2007/12/11
Using the technique of annihilators, we characterize the $w^{*}$-closure of the finite-partition submodule ${{\mathscr R}({\mathscr N}, \sim)}$ of a weakly closed nest algebra module ${\mathscr U}$ co...
期刊信息
篇名
A cartessian closed subcategory of CONT which contains all continuous domains
语种
英文
撰写或编译
撰写
作者
杨忠强
第一作者单位
汕头大学数学系
刊物名称
Information Sciences
页面
Vol 168, 1—7, 2004
出版日期
2004年
月
日
文章标识(ISSN)
002...