Results 11 to 20 of about 305 (227)
Linear Satisfiability Preserving Assignments
Journal of Artificial Intelligence Research, 2018 In this paper, we study several classes of satisfiability preserving assignments to the constraint satisfaction problem (CSP). In particular, we consider fixable, autark and satisfying assignments. Since it is in general NP-hard to find a nontrivial (i.e., nonempty) satisfiability preserving assignment, we introduce linear satisfiability preserving ...
Kei Kimura, Kazuhisa Makino
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Linear maps between $\mathrm{C}^{*}$ -algebras preserving extreme points and strongly linear preservers [PDF]
Banach Journal of Mathematical Analysis, 2016 We study new classes of linear preservers between C$^*$-algebras and JB$^*$-triples. Let $E$ and $F$ be JB$^*$-triples with $\partial_{e} (E_1)$. We prove that every linear map $T:E\to F$ strongly preserving Brown-Pedersen quasi-invertible elements is a triple homomorphism.
Burgos, María J. +3 more
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Linear Mappings that Preserve Potent Operators [PDF]
Proceedings of the American Mathematical Society, 1995 Summary: Let \(H\) and \(K\) be complex Hilbert spaces, while \({\mathcal B}(H)\) and \({\mathcal B}(K)\) denote the algebras of all linear bounded operators on \(H\) and \(K\), respectively. We characterize surjective linear mappings from \({\mathcal B}(H)\) onto \({\mathcal B}(K)\) that preserve potent operators in both directions.
Omladič, Matjaž, Šemrl, Peter
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Linear Transformations Preserving Potent Matrices [PDF]
Proceedings of the American Mathematical Society, 1993 Linear transformations of M n {M_n}
Brešar, Matej, Sěmrl, Peter
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Emittance preservation in linear accelerators [PDF]
AIP Conference Proceedings, 2001 In linear colliders preservation of the phase space density of charged particles during acceleration to high energies is essential. In practice, the electromagnetic fields which govern the beam transport may not be sufficiently well understood. This may arise, for example, from magnet and structure alignment and/or manufacturing errors, time-varying ...
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On multiplicative (strong) linear preservers of majorizations [PDF]
Sahand Communications in Mathematical Analysis, 2016 In this paper, we study some kinds of majorizations on $textbf{M}_{n}$ and their linear or strong linear preservers. Also, we find the structure of linear or strong linear preservers which are multiplicative, i.e.
Mohammad Ali Hadian Nadoshan +1 more
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On Zero-Preserving Linear Transformations
Journal of Mathematical Analysis and Applications, 2002 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Carnicer, J.M., Peña, J.M., Pinkus, A.
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On Some Applications of Matrix Partial Orders in Statistics [PDF]
International Journal of Management, Knowledge and Learning, 2020 In statistics different partial orders appear as useful in several cases. Three of the best known partial orders defined on (sub)sets of real or complex matrices are the Löwner, the minus and the star partial orders.
Iva Golubić, Janko Marovt
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Linear maps preserving G-unitary operators in Hilbert space
Arab Journal of Mathematical Sciences, 2015 Let H be a complex Hilbert space and B(H) the algebra of all bounded linear operators on H. We give the concrete forms of surjective continuous unital linear maps from B(H) onto itself that preserve G-unitary operators.
Abdellatif Chahbi, Samir Kabbaj
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Linear preservers of row-dense matrices [PDF]
Czechoslovak Mathematical Journal, 2016 The authors deal with linear preserves problems of row-dense matrices. A rectangular matrix \(A\) is row-dense if there are no zeros between two nonzero entries in its rows. Furthermore \(A\) is a column-dense matrix if \(A^T\) is row-dense. The structure of linear functions \(T:M_{m,n}\mapsto M_{m,n}\) that preserve or strongly preserve row-dense ...
Motlaghian, Sara M. +2 more
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