نتایج جستجو برای: triangular

تعداد نتایج: 19740  

Journal: :Electr. J. Comb. 2007
Hongyu He

In this paper, we study the simple eigenvectors of two hypomorphic matrices using linear algebra. We also give new proofs of results of Godsil and McKay.

Journal: :Math. Comput. 2005
I. M. Isaacs Dikran B. Karagueuzian

We study the realizability over R of representations of the group U(n) of upper-triangular n× n matrices over F2. We prove that all the representations of U(n) are realizable over R if n ≤ 12, but that if n ≥ 13, U(n) has representations not realizable over R. This theorem is a variation on a result that can be obtained by combining work of J. Arregi and A. Vera-López and of the authors, but th...

Journal: :journal of fasting and health 0
lotfi said superior normal school (ens), hassan ii university, casablanca, morocco. zerdani ilham department of biology. laboratory of ecology and environment (lee). faculty of sciences, hassan ii university, casablanca, morocco. ahmed aggour research and assessment unit in physical activity and sport (creaps), superior normal school (ens), hassan ii university, casablanca, morocco. ahmed fethddine research and assessment unit in physical activity and sport (creaps), superior normal school (ens), hassan ii university, casablanca, morocco. abdelouaheb tazi the hassan ii foundation for scientific and medical research on ramadan (frsmr), faculty of medicine and pharmacy, hassan ii university, casablanca, morocco. mohammed talbi analytical chemistry laboratory and physical chemistry of materials, hassan ii university, casablanca, morocco.

purpose: this study has for objective the assessment of the vigilance, mood states variations and the blood glucose levels, during a triangular effort progressive in trained athletes during ramadan fasting (rf). methods. ten trained male athletes aged 21.8 ± 1.1 years are evaluated before (b.rf), during (1st, 2nd and 3th week) and after ramadan fasting, in the blood-glucose, vigilance, and mood...

Journal: :journal of linear and topological algebra (jlta) 2015
z sadati kh maleknejad

this paper introduces a numerical method for solving the vasicek model by using a stochastic operational matrix based on the triangular functions (tfs) in combination with the collocation method. the method is stated by using conversion the vasicek model to a stochastic nonlinear system of $2m+2$ equations and $2m+2$ unknowns. finally, the error analysis and some numerical examples are provided...

Journal: :international journal of civil engineering 0
a. kaveh iust s. beheshti iust

for the analysis of structures, the first step consists of configuration processing followed by data generation. this step is the most time consuming part of the analysis for large-scale structures. in this paper new graph products called triangular and circular graph products are developed for the formation of the space structures. the graph products are extensively used in graph theory and co...

Journal: :bulletin of the iranian mathematical society 0
x. f. qi department of mathematics‎, ‎shanxi university‎, ‎taiyuan 030006‎, ‎p‎. ‎r‎. ‎china.

‎let $mathcal a$ and $mathcal b$ be unital rings‎, ‎and $mathcal m$‎ ‎be an $(mathcal a‎, ‎mathcal b)$-bimodule‎, ‎which is faithful as a‎ ‎left $mathcal a$-module and also as a right $mathcal b$-module‎. ‎let ${mathcal u}=mbox{rm tri}(mathcal a‎, ‎mathcal m‎, ‎mathcal‎ ‎b)$ be the triangular ring and ${mathcal z}({mathcal u})$ its‎ ‎center‎. ‎assume that $f:{mathcal u}rightarrow{mathcal u}$ is...

1997
Demetri Terzopoulos

Triangular B-splines are a new tool for modeling a broad class of objects de ned over arbitrary, non-rectangular domains. They provide an elegant and uni ed representation scheme for all piecewise continuous polynomial surfaces over planar triangulations. To enhance the power of this model, we propose triangular NURBS, the rational generalization of triangular B-splines, with weights as additio...

2009
DONALD YAU

We introduce a Hom-type generalization of quantum groups, called quasi-triangular Hom-bialgebras. They are non-associative and non-coassociative analogues of Drinfel’d’s quasitriangular bialgebras, in which the non-(co)associativity is controlled by a twisting map. A family of quasi-triangular Hom-bialgebras can be constructed from any quasi-triangular bialgebra, such as Drinfel’d’s quantum env...

Journal: :The Journal of hand surgery 2012
Chris Y K Tang B Fung Chan Rebecca C P Lung

The triangular fibrocartilage complex (TFCC) is an anatomically and biomechanically important structure. Repair of radial-sided TFCC tear has previously been challenging. We designed a new method of radial-sided TFCC tear repair and found that it was also applicable for ulnar-sided TFCC tear repair. From October 2006 to December 2010, 10 patients underwent this operation and were reviewed: 9 me...

2016
Hartwig Anzt Edmond Chow Daniel B. Szyld Jack J. Dongarra

Iterative methods for solving sparse triangular systems are an attractive alternative to exact forward and backward substitution if an approximation of the solution is acceptable. On modern hardware, performance benefits are available as iterative methods allow for better parallelization. In this paper, we investigate how block-iterative triangular solves can benefit from using overlap. Because...

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