Results 41 to 50 of about 275,056 (272)
Electronic Journal of Qualitative Theory of Differential Equations, 2014 In this article we obtain the geometric classification of singularities, finite and infinite, for the three subclasses of quadratic differential systems with $m_f=4$ possessing exactly two finite singularities, namely: (i) systems with two double complex
Joan Artés +4 more
doaj +1 more source
Extension theorems for the Fourier transform associated with non-degenerate quadratic surfaces in vector spaces over finite fields [PDF]
, 2007 We study the restriction of the Fourier transform to quadratic surfaces in vector spaces over finite fields. In two dimensions, we obtain the sharp result by considering the sums of arbitrary two elements in the subset of quadratic surfaces on two ...
Iosevich, Alex, Koh, Doowon
core
On the Geodesic Form of Non-Relativistic Dynamic Equations
, 1999 It is shown that any second order dynamic equation on a configuration bundle $Q\to R$ of non-relativistic mechanics is equivalent to a geodesic equation with respect to a (non-linear) connection on the tangent bundle $TQ\to Q$.
Mangiarotti, L., Sardanashvily, G.
core +2 more sources
Predicting Atomic Charges in MOFs by Topological Charge Equilibration
Advanced Functional Materials, EarlyView.An atomic charge prediction method is presented that is able to accurately reproduce ab‐initio‐derived reference charges for a large number of metal–organic frameworks. Based on a topological charge equilibration scheme, static charges that fulfill overall neutrality are quickly generated.
Babak Farhadi Jahromi +2 more
wiley +1 more source
Gravitomagnetic Moments of the Fundamental Fields
, 1998 The quadratic form of the Dirac equation in a Riemann spacetime yields a gravitational gyromagnetic ratio \kappa_S = 2 for the interaction of a Dirac spinor with curvature. A gravitational gyromagnetic ratio \kappa_S = 1 is also found for the interaction
J. G. PEREIRA +3 more
core +2 more sources
A Correction to the Paper “Quadratic Hamiltonian Vector Fields”
Journal of Differential Equations, 1996 The authors present a corrected version of Theorem 5.2 from their paper [ibid. 107, No. 1, 80-95 (1994; Zbl 0791.34048)].
Artés, Joan C., Llibre, Jaume
openaire +1 more source
Imaging of Biphoton States: Fundamentals and Applications
Advanced Functional Materials, EarlyView.Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley +1 more source
Black hole solutions in the quadratic Weyl conformal geometric theory of gravity
European Physical Journal C: Particles and Fields, 2022 We consider numerical black hole solutions in the Weyl conformal geometry and its associated conformally invariant Weyl quadratic gravity. In this model, Einstein gravity (with a positive cosmological constant) is recovered in the spontaneously broken ...
Jin-Zhao Yang +2 more
doaj +1 more source
2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics
Advanced Functional Materials, EarlyView.2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit +5 more
wiley +1 more source
SL(2, R) × U(1) symmetry and quasinormal modes in the self-dual warped AdS black hole
Journal of High Energy Physics, 2023 The algebraic approach to the spectrum of quasinormal modes has been made as simple as possible for the BTZ black hole by the strategy developed in [16].
Yuan Chen +3 more
doaj +1 more source