Results 11 to 20 of about 278,447 (242)
Irregular locus of the commuting variety of reductive symmetric Lie algebras and rigid pairs [PDF]
, 2010 The aim of this paper is to describe the irregular locus of the commuting variety of a reductive symmetric Lie algebra. More precisely, we want to enlighten a remark of Popov.
Michael, Bulois
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Proceedings of the American Mathematical Society, 1987 Let R R be a principal ideal ring and M k , n {M_{k,n}} the set of k × n k \times n matrices over R R . The following statments are proved: (a) If k ≤ n
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Commutation matrices and Commutation tensors [PDF]
Linear and Multilinear Algebra, 2018 The commutation matrix was first introduced in statistics as a transposition matrix by Murnaghan in 1938. In this paper, we first investigate the commutation matrix which is employed to transform a matrix into its transpose. We then extend the concept of the commutation matrix to commutation tensor and use the commutation tensor to achieve the ...
Changqing Xu, Lingling He, Zerong Lin
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Von Neumann's inequality for commuting weighted shifts [PDF]
, 2016 We show that every multivariable contractive weighted shift dilates to a tuple of commuting unitaries, and hence satisfies von Neumann's inequality. This answers a question of Lubin and Shields.
Hartz, Michael
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Bulletin of the Australian Mathematical Society, 2006 A ring is called a commutator ring if every element is a sum of additive commutators. In this note we give examples of such rings. In particular, we show that given any ring R, a right R-module N, and a nonempty set Ω, EndR(⌖ΩN) and EndR(ΠΩN) are commutator rings if and only if either Ω is infinite or EndR(N) is itself a commutator ring.
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Commutant lifting for commuting row contractions [PDF]
Bulletin of the London Mathematical Society, 2010 one section and references were ...
Davidson, Kenneth R., Le, Trieu
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Transactions of the American Mathematical Society, 1974 Let G be a group generated by x and y, G 2 {G_2} be the commutator subgroup of G, and G 1 {G_1} be the group generated by y and G 2 {G_2} . This paper contains explicit expansions of
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The diameter of the commuting graph of a finite group with trivial centre [PDF]
, 2013 The commuting graph of a finite group with trivial centre is examined.
Morgan, G. L., Parker, C. W.
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Multiple commutator formulas [PDF]
Israel Journal of Mathematics, 2012 Let A be a quasi-finite R-algebra (i.e., a direct limit of module finite algebras) with identity. Let I_i, i=0,...,m, be two-sided ideals of A, \GL_n(A,I_i) the principal congruence subgroup of level I_i in GL_n(A) and E_n(A,I_i) be the relative elementary subgroup of level I_i.
Hazrat, Roozbeh (R16959), Zhang, Zuhong
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Proceedings of the Fifth Israeli Symposium on Theory of Computing and Systems, 2001 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Beigel, Richard, Chang, Richard
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