Results 101 to 110 of about 17,323 (202)

A majorization relation for a certain class of *-quivers with an orthogonality condition [PDF]

open access: yesOpuscula Mathematica, 2004
In [Kruglyak S. A., Samoĭlenko Yu. S.: On structure theorems for a family of idempotents. Ukrainskii Matematicheskii Zhurnal 50 (4), (1998) (Russian), Kruglyak S. A., Samoĭlenko Yu.
O. V. Bagro, S. A. Kruglyak
doaj  

On Optimal and Quantum Code Construction from Cyclic Codes over FqPQ with Applications. [PDF]

open access: yesEntropy (Basel), 2023
Ali S   +5 more
europepmc   +1 more source

The Tropical Matrix Groups with Symmetric Idempotents

open access: yesDiscrete Dynamics in Nature and Society, 2018
In this paper we study the semigroup Mn(T) of all n×n tropical matrices under multiplication. We give a description of the tropical matrix groups containing a diagonal block idempotent matrix in which the main diagonal blocks are real matrices and other ...
Lin Yang
doaj   +1 more source

On Constructing Orthogonal Idempotents

open access: yesRocky Mountain Journal of Mathematics, 2007
Let \(A\) be a commutative semisimple algebra over an algebraically closed field. Let \(e_1,\dots,e_{n-1}\), where \(3\leq n\leq\dim A\), be nontrivial orthogonal idempotents in \(A\) such that \(e_1,\dots,e_{n-2}\) are minimal. It is shown that then there exist nontrivial orthogonal idempotents \(q_1,\dots,q_n\) with \(q_1,\dots,q_{n-1}\) minimal.
openaire   +3 more sources

Isomorphism of generalized triangular matrix-rings and recovery of tiles

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
We prove an isomorphism theorem for generalized triangular matrix-rings, over rings having only the idempotents 0and 1, in particular, over indecomposable commutative rings or over local rings (not necessarily commutative).
R. Khazal, S. Dăscălescu, L. Van Wyk
doaj   +1 more source

Paraunitary matrices and group rings [PDF]

open access: yesInternational Journal of Group Theory, 2014
Design methods for paraunitary matrices from complete orthogonal sets of idempotents and related matrix structuresare presented. These include techniques for designing non-separable multidimensional paraunitary matrices.
Barry Hurley, Ted Hurley
doaj  

Generalized periodic and generalized Boolean rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We prove that a generalized periodic, as well as a generalized Boolean, ring is either commutative or periodic. We also prove that a generalized Boolean ring with central idempotents must be nil or commutative. We further consider conditions which imply
Howard E. Bell, Adil Yaqub
doaj   +1 more source

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