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Torsion units in integral group rings of Conway simple groups
Zassenhaus conjecture torsion unit partial augmentation
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2011/2/24
Using the Luthar–Passi method, we investigate the possible orders and partial augmentations of torsion units of the normalized unit group of integral group rings of Conway simple groups Co1, Co2 and C...
A new method for ranking of fuzzy decision making units by FPR/DEA method
data envelopment analysis multi-attribute decision-making
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2010/11/1
The goal of multi-attribute decision-making problems is the ranking of units. In real world, we usually deal with in inexact data. So, there are various ways for ranking of decision making units in fu...
Seminar Notes on Open Questions in Iwasawa Theory - SNOQIT I: The $\Lambda[ G ]$-modules of Iwasawa theory II: Units and Kummer theory in Iwasawa extensions
11R23 Iwasawa Theory 11R27 Units
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2010/12/9
For = Zp[[T ]], the ring of formal power series in one variable, the structure of the finitely generated - torsion modules is a main concern of Iwasawa theory. In this first part of Snoqit1 we inv...
On rings of integers generated by their units
sums of units generated by units
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2010/11/29
We give an affirmative answer to the following question by Jarden and Narkiewicz: Is it true that every number field has a finite extension L such that the ring of integers of L is generated by its un...
In praise of order units
praise of order units
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2010/12/14
We show that the ordered rings naturally associated to compact convex polyhedra with interior satisfy a positivity property known as order unit cancellation, and obtain other general positivity result...
Group rings whose group of units is hyperbolic
hyperbolic group group ring unit group
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2010/12/6
We study those group rings whose group of units is hyperbolic.Let (X, ) be a metric space with metric . For any a, b, c ∈ X, the Gromov product hb, cia of b and c with respect to a ∈ X is defined as...
Ranking decision making units in fuzzy-DEA using entropy
DEA Maximum entropy Ranking Weighting function
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2010/9/10
Data Envelopment Analysis (DEA) can be regarded as a useful management tool to the assessment evaluation of decision making units (DMUs) using multiple inputs to produce multiple outputs. In some case...
Improving efficiency scores of inefficient units with restricted primary resources
data envelopment analysis reallocation
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2010/9/17
An important issue in Data Envelopment Analysis (DEA) is finding the efficiency scores of Decision Making Units (DMUs). For improving the efficiency scores of inefficient units, it is important to con...
Efficiency measurement of multi-component decision making units using data envelopment analysis
Data envelopment analysis Decision making unit
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2010/9/17
Ordinary DEA models, such as the CCR and BCC models, are not able to measure the efficiency of multi-component decision making units. In management science, there is a need for methods that are capabl...
Selection of an eligible benchmark for interval decision making units with input contraction
Data envelopment Analysis Input Contraction Interval Data
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2010/9/15
This paper offers an extension of obtaining an eligible benchmark using the concept of input contraction on interval data. Here, it is worthwhile obtaining most proportionality benchmark, which it wil...
Classification of decision making units with interval data using SBM model
DEA Slacks SBM-efficiency Interval data
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2010/9/15
In original data envelopment analysis (DEA) models, the data for all inputs and outputs are known exactly. When some inputs and outputs are unknown decision variables, such as interval data, ordinal d...
Exchange rings generated by their units
置换环 本原分式环 强$\pi$正则环
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2007/12/10
假设$R$为本原分式Artinian环,证明了有$u\in U(R)$使得$1_R\pm u\in U(R)$ 当且仅当对任何$a\in R$, 有$u\in U(R)$使得$a\pm u\in U(R)$. 进一步，证明了 对任何$A\in M_n(R)(n\geq 2)$, 有$U\in GL_n(R)$ 使得$A\pm U\in GL_n(R)$. 作为应用得到了强$\pi$正则环中任何元素...
A three-dimensional structure,four-connected network of the zeolite Li-A(BW) topological frame sustained by [Hg(hmt)1/2Br2] units via secondary bonding
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2007/7/28
期刊信息
篇名
A three-dimensional structure,four-connected network of the zeolite Li-A(BW) topological frame sustained by [Hg(hmt)1/2Br2] units via secondary bonding
语种
英文
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作者
L.Pan,N.W.Zheng et al
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