Results 31 to 40 of about 294,494 (242)

Monomial codes seen as invariant subspaces

open access: yesOpen Mathematics, 2017
It is well known that cyclic codes are very useful because of their applications, since they are not computationally expensive and encoding can be easily implemented. The relationship between cyclic codes and invariant subspaces is also well known.
García-Planas María Isabel   +2 more
doaj   +1 more source

CP symmetry and symplectic modular invariance

open access: yesSciPost Physics, 2021
We analyze CP symmetry in symplectic modular-invariant supersymmetric theories. We show that for genus $g\ge 3$ the definition of CP is unique, while two independent possibilities are allowed when $g\le 2$.
Gui-Jun Ding, Ferruccio Feruglio, Xiang-Gan Liu
doaj   +1 more source

Cluster robust error estimates for the Rayleigh–Ritz approximation I: Estimates for invariant subspaces [PDF]

open access: yes, 2006
This is the first part of a paper that deals with error estimates for the Rayleigh–Ritz approximations to the spectrum and invariant subspaces of a bounded Hermitian operator in a Hilbert or Euclidean space.
Ovtchinnikov, E.
core   +1 more source

Automated detection of symmetry-protected subspaces in quantum simulations

open access: yesPhysical Review Research, 2023
The analysis of symmetry in quantum systems is of utmost theoretical importance, useful in a variety of applications and experimental settings, and difficult to accomplish in general. Symmetries imply conservation laws, which partition Hilbert space into
Caleb Rotello   +3 more
doaj   +1 more source

Invariant Subspaces and Perturbations [PDF]

open access: yesProceedings of the American Mathematical Society, 1992
We study the stability of proper closed invariant subspaces with respect to perturbations in norm of continuous operators on a Hubert space, using a nonlinear C
openaire   +1 more source

Approximately Invariant Subspaces [PDF]

open access: yes, 2003
Invariant subspaces are well documented in the literature and approximations for them exist. Approximately invariant subspaces have properties that are highly desirable for iterative solution strategies of large sparse matrix systems and for ...
Ilic, Milos   +3 more
core   +1 more source

Invariant Subspace Decomposition

open access: yesJ. Mach. Learn. Res.
ISSN:1532 ...
Lazzaretto, Margherita   +2 more
openaire   +6 more sources

Maximal J-semi-definite invariant subspaces of unbounded J-selfadjoint operators in Krein spaces [PDF]

open access: yes, 2021
In this paper we establish conditions for the existence of maximal J-semi-definite invariant subspaces of unbounded J-selfadjoint operators. Our results allow for operators where all entries of the formal matrix representation induced by the indefinite ...
Langer, Heinz, Tretter, Christiane
core   +2 more sources

Certain invariant subspaces for operators with rich eigenvalues

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1991
For a connected open subset Ω of the plane and n a positive integer, let Bn(Ω) be the space introduced by Cowen and Douglas. In this article we study the spectrum of restrictions of T in order to obtain more information about the invariant subspaces of T.
Karim Seddighi
doaj   +1 more source

New AI‐Assisted Approach for Expanding the Solution Space: Application to Lattice Structure Design

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces an innovative framework for designing structured materials by ex panding the design space through reparameterization of qualitative variables into continuous structural descriptors. Combined with machine‐learning‐based prediction and multi‐objective optimization, the approach enables the discovery of novel lattice architectures ...
G. H. Gahimbare   +5 more
wiley   +1 more source

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