Results 61 to 70 of about 14,964 (295)

On the δ-chromatic numbers of the Cartesian products of graphs

open access: yesOpen Mathematics
In this work, we study the δ\delta -chromatic number of a graph, which is the chromatic number of the δ\delta -complement of a graph. We give a structure of the δ\delta -complements and sharp bounds on the δ\delta -chromatic numbers of the Cartesian ...
Tangjai Wipawee   +2 more
doaj   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

open access: yesAdvanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh   +2 more
wiley   +1 more source

Diagonalized Cartesian products of S-prime graphs are S-prime [PDF]

open access: yes, 2012
A graph is said to be S-prime if, whenever it is a subgraph of a nontrivial Cartesian product graph, it is a subgraph of one of the factors. A diagonalized Cartesian product is obtained from a Cartesian product graph by connecting two vertices of maximal
Lydia Ostermeier   +5 more
core   +3 more sources

On subgraph relationships between graph products

open access: yesJournal of Nigerian Society of Physical Sciences
Graph products play an important role in graph theory by providing systematic methods for constructing complex graphs from simpler ones and by revealing structural relationships among different graph classes.
Jinta Jose, Ninu S. Lal, Bobin George
doaj   +1 more source

Alternate product adjacencies in digital topology

open access: yesApplied General Topology, 2018
We study properties of Cartesian products of digital images, using a variety of adjacencies that have appeared in the literature.
Laurence Boxer
doaj   +1 more source

Gate‐Tunable Floquet Weyl Photon Emission from Topological Dirac Semimetal Cd3As2

open access: yesAdvanced Materials, EarlyView.
We report experimental demonstration of Floquet band engineering in a 3D Dirac semimetal. Circularly polarized light breaks the time reversal symmetry and transforms Cd3As2 into a Floquet–Weyl phase, splitting Dirac nodes into chirality‐opposite Weyl nodes with nonzero Berry curvature.
Sobhan Subhra Mishra   +4 more
wiley   +1 more source

CARTESIAN PRODUCTS OF P QP M-SPACES [PDF]

open access: yes, 2014
. In this paper we define the concept of finite and countable Cartesian products of P qpM-spaces and give a number of its properties.
A. A. Taleshian   +2 more
core  

Rapid Bushy Join-order Optimization with Cartesian Products [PDF]

open access: yes, 1996
Query optimizers often limit the search space for join orderings, for example by excluding Cartesian products in subplans or by restricting plan trees to left-deep vines.
David Maier, Bennet Vance
core   +1 more source

The Crossing Number of Cartesian Product of 5-Wheel with any Tree

open access: yesDiscussiones Mathematicae Graph Theory, 2021
In this paper, we establish the crossing number of join product of 5-wheel with n isolated vertices. In addition, the exact values for the crossing numbers of Cartesian products of the wheels of order at most five with any tree T are given.
Wang Yuxi, Huang Yuanqiu
doaj   +1 more source

Measuring the Hall Effect in Hysteretic Materials

open access: yesAdvanced Materials, EarlyView.
The authors highlight common pitfalls in measuring the Hall effect: in hysteretic magnets, improper data processing can create signals that look exotic but are not real. This Perspective explains the origin of these artifacts and presents practical measurement strategies that help researchers identify reliable Hall responses in complex magnetic ...
Jaime M. Moya   +6 more
wiley   +1 more source

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