Results 81 to 90 of about 550,301 (203)

On the Meaning of Localization in Non‐Local Quantum Field Theory

Annalen der Physik, Volume 538, Issue 6, June 2026.
In non‐local quantum field theory nature does not necessarily allow objects or events to be localized to exact mathematical points. Instead any physical measurement has a built‐in finite resolution set by the non‐locality scale. Spacetime remains continuous and Lorentz‐covariant, but below this scale pointlike localization becomes an idealization ...
E. J. Thompson
wiley   +1 more source

Right Conoids Demonstrating a Time-like Axis within Minkowski Four-Dimensional Space

Mathematics
In the four-dimensional Minkowski space, hypersurfaces classified as right conoids with a time-like axis are introduced and studied. The computation of matrices associated with the fundamental form, the Gauss map, and the shape operator specific to these
Yanlin Li, Erhan Güler
doaj   +1 more source

Hybrid Multiscale Method for Polymer Melts: Analysis and Simulations

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 5, May 2026.
ABSTRACT We model the flow behaviour of dense melts of flexible and semiflexible ring polymers in the presence of walls using a hybrid multiscale approach. Specifically, we perform molecular dynamics simulations and apply the Irving–Kirkwood formula to determine an averaged stress tensor for a macroscopic model.
Ranajay Datta, Mária Lukáčová‐Medviďová, Andreas Schömer, Peter Virnau   +3 more
wiley   +1 more source

Shape sensitivity for the Laplace–Beltrami operator with singularities

Journal of Differential Equations, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ferchichi, Jamel, Zolésio, Jean-Paul
openaire   +1 more source

Extremal determinants of Laplace–Beltrami operators for rectangular tori [PDF]

Mathematische Zeitschrift, 2020
AbstractIn this work we study the determinant of the Laplace–Beltrami operator on rectangular tori of unit area. We will see that the square torus gives the extremal determinant within this class of tori. The result is established by studying properties of the Dedekind eta function for special arguments.
openaire   +2 more sources

On Gauge‐Invariant Entire Function Regulators and UV Finiteness in Non Local Quantum Field Theory

Annalen der Physik, Volume 538, Issue 4, April 2026.
We regulate the theory with an entire function of the covariant operator F(□/M∗2)$F(\square /M^{2}_{*})$. In the perturbative vacuum this becomes a momentum‐space factor F(−p2/M∗2)$F(-p^{2}/M^{2}_{*})$ that exponentially damps high momenta, most transparent after Wick rotation, rendering loop integrals UV finite.
J. W. Moffat, E. J. Thompson
wiley   +1 more source

A discrete Laplace–Beltrami operator for simplicial surfaces [PDF]

, 2006
We define a discrete Laplace-Beltrami operator for simplicial surfaces (Definition 16). It depends only on the intrinsic geometry of the surface and its edge weights are positive.
Alexander I Bobenko, Boris A Springborn
core  

Convergence of Discrete Laplace-Beltrami Operators over Surfaces [PDF]

, 2004
The convergence property of the discrete Laplace-Beltrami operators is the foundation of convergence analysis of the numerical simulation process of some geometric partial differential equations which involve the operator.
Xu, Guoliang, Guoliang Xu
core   +1 more source

Asymptotics of the graph laplacian near an isolated singularity

Applied Mathematics in Science and Engineering
We investigate the asymptotics of the graph Laplacian on a Riemannian manifold that admits an isolated singularity [Formula: see text]. This operator, and its variants underlie kernel methods, manifold learning, and spectral constructions based on ...
Susovan Pal
doaj   +1 more source