Results 71 to 80 of about 58,187 (222)

Dimer models and conformal structures

Communications on Pure and Applied Mathematics, Volume 79, Issue 2, Page 340-446, February 2026.
Abstract Dimer models have been the focus of intense research efforts over the last years. Our paper grew out of an effort to develop new methods to study minimizers or the asymptotic height functions of general dimer models and the geometry of their frozen boundaries.
Kari Astala, Erik Duse, István Prause, Xiao Zhong   +3 more
wiley   +1 more source

Coordinate‐ and Spacetime‐Independent Quantum Physics

Annalen der Physik, Volume 538, Issue 1, January 2026.
This article studies in the framework of quantum field theory in curved spacetime, if there exists a single zero‐rank‐tensor solution of a Klein‐Gordon PDE, being valid at once for the depicted spacetimes. The answer is shown to be affirmative, even for a class of such solutions having the standard applications in particle physics. ABSTRACT The concept
Viacheslav A. Emelyanov, Daniel Robertz
wiley   +1 more source

Possible Simple Structures of the Universe to Include General Relativity Effects [PDF]

INCAS Bulletin, 2017
The general relativity describes the universe properties, the gravity playing a fundamental role. One uses a metric tensor in a Riemann space, g  , which should be in agreement with a mass (or energy) tensor in order to satisfy the Einstein equation of
Corneliu BERBENTE, Sorin BERBENTE
doaj   +1 more source

On manifolds admitting the consistent Lagrangian formulation for higher spin fields

, 2011
We study a possibility of Lagrangian formulation for free higher spin bosonic totally symmetric tensor field on the background manifold characterizing by the arbitrary metric, vector and third rank tensor fields in framework of BRST approach.
Barnich G., Barnich G., Batalin I. A., Bekaert X., Bonelli G., Burdik C., Fotopoulos A., Fotopoulos A., Fradkin E. S., Gelfond O. A., I. L. BUCHBINDER, Klishevich S. M., Moshin P. Yu., P. M. LAVROV, V. A. KRYKHTIN, Vasiliev M.   +15 more
core   +1 more source

Quantum GraviElectro Dynamics

Annalen der Physik, Volume 538, Issue 1, January 2026.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

Complete shrinking Riemann solitons [PDF]

Arab Journal of Mathematical Sciences
PurposeThis paper investigates the topological and geometric properties of complete shrinking Riemann solitons (Mm, g, µ, V), extending classical results from Ricci solitons to the more general Riemann soliton setting.Design/methodology/approachWe employ
Mehdi Jafari, Shahroud Azami
doaj   +1 more source

Generalized Gravity and a Ghost

, 2005
We show that generalized gravity theories involving the curvature invariants of the Ricci tensor and the Riemann tensor as well as the Ricci scalar are equivalent to multi- scalar-tensor gravities with four derivatives terms.
Aragone C, Barrow J D, Capozziello S Carloni S Troisi A, Carroll S M, Carroll S M De Felice A Duvvuri V Easson D A Trodden M Turner M S, DeWitt B S, Esposito-Farese G, Ferraris M, Ferraris M, Hindawi A, Hindawi A, Jakubiec A, Núñez A Solganik S, Takeshi Chiba   +13 more
core   +1 more source

Vector‐Based and Machine Learning Approaches for Pore Network Parameters Analysis

Geophysical Prospecting, Volume 74, Issue 1, January 2026.
ABSTRACT Accurate characterization of pore structures in carbonate rocks is critical for evaluating fluid flow and storage capacity in subsurface reservoirs, a key concern in geophysical exploration and reservoir engineering. This study proposes a hybrid digital rock physics workflow that integrates deep learning–based segmentation, vectorial geometric
José Frank V. Gonçalves, José J. S. de Figueiredo, João Rafael B. S. Da Silveira, Pedro T. P. Aum, Daniel N. N. Da Silva   +4 more
wiley   +1 more source

The Impact of Quasi-Conformal Curvature Tensor on Warped Product Manifolds

Axioms
This work investigates the effects on the factor manifolds of a singly warped product manifold resulting from the presence of a quasi-conformally flat, quasi-conformally symmetric, or divergence-free quasi-conformal curvature tensor.
Bang-Yen Chen, Sameh Shenawy, Uday Chand De, Alaa Rabie, Nasser Bin Turki   +4 more
doaj   +1 more source

Quadratic gravity and conformally coupled scalar fields

Journal of High Energy Physics, 2020
We construct black hole solutions in four-dimensional quadratic gravity, supported by a scalar field conformally coupled to quadratic terms in the curvature.
Nicolás Cáceres, José Figueroa, Julio Oliva, Marcelo Oyarzo, Ricardo Stuardo   +4 more
doaj   +1 more source