Results 71 to 80 of about 24,818 (197)
On Multilevel Energy‐Based Fragmentation Methods
International Journal of Quantum Chemistry, Volume 126, Issue 3, January 30, 2026.We investigate the working equations of energy‐based fragmentation methods and present ML‐SUPANOVA, a Möbius‐inversion‐based multilevel fragmentation scheme that enables adaptive, quasi‐optimal truncations to efficiently approximate Born‐Oppenheimer potentials across hierarchies of electronic‐structure methods and basis sets.
James Barker +2 more
wiley +1 more source
Delayformer: Spatiotemporal Transformation for Predicting High‐Dimensional Dynamics
Advanced Science, Volume 13, Issue 3, 14 January 2026.Delayformer introduces a multivariate spatiotemporal transformation (mvSTI) that converts observed variables into delay‐embedded states and cross‐learns their dynamics using a shared Vision Transformer encoder. This approach, grounded in dynamical systems theory, simultaneously predicts all variables in high‐dimensional systems, outperforming state‐of ...
Zijian Wang, Peng Tao, Luonan Chen
wiley +1 more source
The quantum information manifold for epsilon-bounded forms
, 1999 Let H be a self-adjoint operator bounded below by 1, and let V be a small form perturbation such that RVS has finite norm, where R is the resolvent at zero to the power 1/2 +epsilon, and S is the resolvent to the power 1/2-epsilon.
Amari +21 more
core +1 more source
Maternal Vitamin D Deficiency and Its Effects on Pregnancy Outcomes
Food Science &Nutrition, Volume 14, Issue 1, January 2026.Vitamin D deficiency was highly prevalent among Malaysian pregnant women, with intake below recommended levels. Deficient vitamin D status was significantly associated with gestational hypertensive disorder, preterm birth, Group B Streptococcus carriage, and cesarean section.
Yakubu Ibrahim +4 more
wiley +1 more source
An Axiomatic Approach to Mild Distributions
AxiomsThe Banach Gelfand Triple (S0,L2,S0′) consists of the Feichtinger algebra S0(Rd) as a space of test functions, the dual space S0′(Rd), known as the space of mild distributions, and the intermediate Hilbert space L2(Rd). This Gelfand Triple is very useful
Hans G. Feichtinger
doaj +1 more source
Polynomially oscillatory multipliers on Gelfand–Shilov spaces
Mathematische Nachrichten, Volume 299, Issue 1, Page 35-59, January 2026.Abstract We study continuity of the multiplier operator eiq$\text{e}^{\text{i} q}$ acting on Gelfand–Shilov spaces, where q$q$ is a polynomial on Rd$\mathbf {R}^{d}$ of degree at least two with real coefficients. In the parameter quadrant for the spaces, we identify a wedge that depends on the polynomial degree for which the operator is continuous.
Alexandre Arias Junior, Patrik Wahlberg
wiley +1 more source
Generic transitivity for couples of Hamiltonians
, 2013 We study orbits and reachable sets of generic couples of Hamiltonians $H_1, H_2$ on a symplectic manifold $N$. We prove that, $C^k$-generically for $k$ large enough, orbits coincide with the whole of $N$, and that the same is true for reachable sets when
Mandorino, Vito
core +1 more source
Temporal pulse shaping aspects of refractive X‐ray lenses
Journal of Synchrotron Radiation, Volume 33, Issue 1, Page 52-62, January 2026.This work investigates the temporal effects of refractive X‐ray lenses on ultra‐short pulses from X‐ray free‐electron lasers. Using both a full Fresnel theory model and a simplified ray‐tracing approach, the paper analyzes the pulse elongation and spatio‐temporal distortions introduced by these focusing optics.Refractive X‐ray lenses are frequently ...
Fabian Trost +2 more
wiley +1 more source
Existence of conjugacies and stable manifolds via suspensions
Electronic Journal of Differential Equations, 2017 We obtain in a simpler manner versions of the Grobman-Hartman theorem and of the stable manifold theorem for a sequence of maps on a Banach space, which corresponds to consider a nonautonomous dynamics with discrete time.
Luis Barreira +2 more
doaj
Unified Asymptotics for Investment Under Illiquidity: Transaction Costs and Search Frictions
Mathematical Finance, Volume 36, Issue 1, Page 67-98, January 2026.ABSTRACT This paper investigates the optimal investment problem in a market with two types of illiquidity: transaction costs and search frictions. We analyze a power‐utility maximization problem where an investor encounters proportional transaction costs and trades only when a Poisson process triggers trading opportunities.
Tae Ung Gang, Jin Hyuk Choi
wiley +1 more source