Results 51 to 60 of about 614,346 (163)
On direct sums of Baer modules
Journal of Algebra, 2009 A ring \(R\) is called Baer if the left annihilator of every nonempty subset of \(R\) is generated by an idempotent. In a general module theoretic setting, the concept of a Baer module was defined by the present authors [in Commun. Algebra 32, No. 1, 103-123 (2004; Zbl 1072.16007)] in terms of its endomorphism ring. Indeed, a right \(R\)-module \(M_R\)
Rizvi, S. Tariq, Roman, Cosmin S.
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Semi-Simple Extension of the (Super) Poincaré Algebra
Advances in High Energy Physics, 2009 A semi-simple tensor extension of the Poincaré algebra is proposed for the arbitrary dimensions D. It is established that this extension is a direct sum of the D-dimensional Lorentz algebra so(D−1, 1) and D-dimensional anti-de Sitter (AdS) algebra so(D−1,
Dmitrij V. Soroka, Vyacheslav A. Soroka
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Direct sums of semi-projective modules
Colloquium Mathematicum, 2012 We investigate when the direct sum of semi-projective modules is semi-projective. It is proved that if R is a right Ore domain with right quotient division ring Q not equal R and X is a free right R-module then the right R-module Q circle plus X is semi-projective if and only if there does not exist an R-epimorphism from X to ...
Tutuncu, Derya Keskin +2 more
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Estimating the First, Hyper-Zagreb Index for Direct Product of F-Sum Graphs
MathematicsA chemical graph is an illustration of a chemical compound’s structural formula, where the edges indicate covalent bonding and the vertices depict atoms.
Suha Wazzan, Rauf Irshad
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On the spectra of non-selfadjoint differential operators and their adjoints in direct sum spaces
International Journal of Mathematics and Mathematical Sciences, 2003 The general ordinary quasidifferential expression Mp of nth order, with complex coefficients and its formal adjoint Mp+ on any finite number of intervals Ip=(ap,bp), p=1,…, N, are considered in the setting of the direct sums of Lwp2(ap ...
Sobhy El-Sayed Ibrahim
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Direct Sums of Voronovskaja's Type Formulas
Rocky Mountain Journal of Mathematics, 2010 Using the general procedure the authors consider some combination of different approximation processes by means of projections on orthogonal subspaces. They concentrate their attention on some particular positive approximation processes in the space of \(L^2\)-real functions in order to satisfy a prescribed asymptotic formula.
CAMPITI, Michele, TACELLI, CRISTIAN
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Complex structures on the complexification of a real Lie algebra
Complex Manifolds, 2018 Let g = a+b be a Lie algebra with a direct sum decomposition such that a and b are Lie subalgebras. Then, we can construct an integrable complex structure J̃ on h = ℝ(gℂ) from the decomposition, where ℝ(gℂ) is a real Lie algebra obtained from gℂby the ...
Yamada Takumi
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Entanglement Detection via Direct-Sum Majorization Uncertainty Relations. [PDF]
Sci Rep, 2020 Wang K, Wu N, Song F.
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Direct sums of J-rings and radical rings
International Journal of Mathematics and Mathematical Sciences, 1995 Let R be a ring, J(R) the Jacobson radical of R and P the set of potent elements of R. We prove that if R satisfies (∗) given x, y in R there exist integers m=m(x,y)>1 and n=n(x,y)>1 such that xmy=xyn and if each x∈R is the sum of a potent element and a ...
Xiuzhan Guo
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Tongxin xuebao, 2017 The capacity issue of a denoise-and-forward(DNF) protocol was focused on based PNC system of frequency non-selective Rayleigh fading channel.First,the total sum-rate of the system was derived.With the derived sum-rate expression,two policies maximizing ...
Rui-feng GAO +4 more
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