Results 141 to 150 of about 4,979,723 (296)
Ihm-admissible and Ihm-forbidden quasiorders on sets
Siberian Mathematical Journal, 2016 We consider the existence problems for quasiorders on sets in terms of which it is possible to describe the algebraic closure operator on subsets of universal algebras with a given universe.
openaire +1 more source
Advanced Science, EarlyView.The symmetry‐driven coexistence of altermagnetism and (anti)ferroelectricity in perovskites shows a strong dimensional dependence. Upon reducing the system from bulk to the two‐dimensional limit, only C‐type antiferromagnetic order retains ferroelectrically switchable altermagnetism, whereas A‐ and G‐type orders become conventional antiferromagnets ...
Zhou Cui +6 more
wiley +1 more source
Panchromatic JWST Observations and Models of the Dim Type Iax Supernova SN 2024vjm at 200 days
The Astrophysical Journal LettersWe report JWST spectra and photometry of the underluminous Type Iax supernova (SN Iax) 2024vjm obtained 202.8 rest-frame days postexplosion. The spectrum exhibits a rich set of forbidden lines from low-ionization, intermediate-mass, and iron-group ...
E. Baron +25 more
doaj +1 more source
Superatom Distortion Induces Triferroicity and Spin Splitting in Two‐Dimensional Antiferromagnets
Advanced Science, EarlyView.The incorporation of superatoms into a 2D square lattice induces symmetry breaking, thereby enabling concurrent coupling among magnetism, ferroelectricity, and ferroelasticity. This strategy achieves triferroic behavior—characterized by spin‐split antiferromagnetic ground states—and offers a viable pathway toward energy‐efficient spintronic devices ...
Zhen Gao +6 more
wiley +1 more source
Computing Forbidden Words of . . .
, 2003 We give a quadratic-time algorithm to compute the set of minimal forbidden words of a factorial regular language. We give a linear-time algorithm to compute the minimal forbidden words of a finite set of words.
Marie-Pierre Béal +3 more
core
Single machine scheduling with forbidden start times
, 2009 International audienceThis paper addresses a single machine scheduling problem in which the following simple constraint is added: a set of time slots is forbidden for starting a task, that is no task can start at any forbidden time point.
Sourd, Francis, Billaut, Jean-Charles
core +1 more source
Advanced Science, EarlyView.Interlayer sliding in the RuO2Zn2F2 bilayer induces ferroelectricity and enables reversible valley polarization switching. The electric dipole and valley‐resolved band edges are intimately coupled, revealing sliding ferroelectricity as a powerful mechanism for electrical control of valley degrees of freedom in 2D materials.
Djamel Bezzerga +3 more
wiley +1 more source
Searching accretion-enhanced dark matter annihilation signals in the Galactic Centre
Journal of High Energy PhysicsThis study reanalyzes the detection prospects of dark matter (DM) annihilation signals in the Galactic Center, focusing on velocity-dependent dynamics within a spike density near the supermassive black hole (Sgr A⋆).
Meiwen Yang +7 more
doaj +1 more source
Characterizing the forbidden pairs for graphs to be super-edge-connected
AKCE International Journal of Graphs and CombinatoricsLet [Formula: see text] be a set of given connected graphs. A graph G is said to be [Formula: see text]-free if G contains no H as an induced subgraph for any [Formula: see text].
Hazhe Ye, Yingzhi Tian
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Advanced Science, EarlyView.Multiferroic order parameters – polarization, magnetization, and ferroelastic strain – are positioned as dynamic design variables for batteries. Their mechanistic roles, practical tuning through fabrication and external fields, and ferroic‐resolved characterization routes are unified into a closed‐loop framework, revealing how coupled ferroic responses
Jiaqi Su +13 more
wiley +1 more source