Results 31 to 40 of about 83,698 (229)
Derivations of certain operator algebras
International Journal of Mathematics and Mathematical Sciences, 2000 Let 𝒩 be a nest and let 𝒜 be a subalgebra of L(H) containing all rank one operators of alg 𝒩. We give several conditions under which any derivation δ from 𝒜 into L(H) must be inner.
Jiankui Li, Hemant Pendharkar
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Factorisation of orthogonal projectors
Математичні Студії, 2021 We study the problem of a special factorisation of an orthogonal projector~$P$ acting in the Hilbert space $L_2(\mathbb R)$ with $\dim\ker ...
N. S. Sushchyk, V. M. Degnerys
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n -Derivations of triangular algebras
Linear Algebra and its Applications, 2013 Let \(\mathcal A\) be a triangular algebra. Let \(n\geq 2\) be an integer. A mapping \(\varphi\colon\mathcal A\times\mathcal A\times\cdots\times\mathcal A\to\mathcal A\) is said to be an \(n\)-derivation if it is a derivation in each argument. In this paper the authors mainly investigate \(n\)-derivations (\(n\geq 3\)) for a certain class of triangular
Wang, Yao, Wang, Yu, Du, Yiqiu
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Involutive triangular matrix algebras
Hacettepe Journal of Mathematics and Statistics, 2020 In this paper we provide new examples of Banach $ \ast $-subalgebras of the matrix algebra $M_n(\mathscr{A}) $ over a commutative unital $C^*$-algebra $\mathscr{A}$. For any involutive algebra, we define two involutions on the triangular matrix extensions. We prove that the triangular matrix algebras over any commutative unital $C^*$-algebra
Morteza AHMADİ, Ahmad MOUSSAVİ
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Jordan automorphisms of triangular algebras II [PDF]
Commentationes Mathematicae Universitatis Carolinae, 2015 Summary: We give a sufficient condition under which any Jordan automorphism of a triangular algebra is either an automorphism or an anti-automorphism.
Aiat Hadj, Driss Ahmed, Tribak, Rachid
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Perluasan Masalah Isoperimetrik pada Bangun Ruang
Jambura Journal of Mathematics, 2023 In this paper, several extensions of the isoperimetric problem in solid figures are explored, focusing on oblique and right prisms with rectangular, right-angled triangular, and regular hexagonal bases. The objective of this research is to find the prism
Andri Setiawan +2 more
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Kraskiewicz-Pragacz modules and Pieri and dual Pieri rules for Schubert polynomials [PDF]
Discrete Mathematics & Theoretical Computer Science, 2020 In their 1987 paper Kraskiewicz and Pragacz defined certain modules, which we call KP modules, over the upper triangular Lie algebra whose characters are Schubert polynomials.
Masaki Watanabe
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Semisimple Triangular AF Algebras
Journal of Functional Analysis, 1993 Necessary and sufficient conditions for a triangular AF algebra to be semisimple are given. In particular, a triangular AF algebra which can be written using the standard embedding infinitely often is semisimple; also a semisimple triangular AF algebra is given which does not have a presentation of this form. If two triangular AF algebras have the same
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Triangular decomposition of semi-algebraic systems [PDF]
Journal of Symbolic Computation, 2010 8 pages, accepted by ISSAC ...
Chen, Changbo +5 more
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Non-finitary Generalizations of Nil-triangular Subalgebras of Chevalley Algebras
Известия Иркутского государственного университета: Серия "Математика", 2019 Let $N\Phi(K)$ be a niltriangular subalgebra of Chevalley algebra over a field or ring $K$ associated with root system $\Phi$ of classical type. For type $A_{n-1}$ it is associated to algebra $NT(n,K)$ of (lower) nil-triangular $n \times n$- matrices ...
J. V. Bekker +2 more
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