Results 91 to 100 of about 91,026 (243)

Non-commutativity, Zero modes and D-brane Geometry

, 1999
The non-commutative geometry is revisited from the perspective of a generalized D p-brane. In particular, we analyze the open bosonic string world-sheet description and show that an effective non-commutative description on a D p-brane corresponds to a re-
Abouelsaood, Ardalan, Banks, Berkooz, Bigatti, Callan, Cheung, Chu, Connes, Douglas, Douglas, Douglas, Fradkin, Ho, Ishibashi, Ishibashi, Kar, Kar, Kar, Kato, Kawano, Li, Okuyama, Polchinski, Schomerus, Sieberg, Supriya Kar, Witten   +27 more
core   +2 more sources

Bidiagonal Decompositions and Accurate Computations for the Ballot Table and the Fibonacci Matrix

Numerical Linear Algebra with Applications, Volume 33, Issue 1, February 2026.
ABSTRACT Riordan arrays include many important examples of matrices. Here we consider the ballot table and the Fibonacci matrix. For finite truncations of these Riordan arrays, we obtain bidiagonal decompositions. Using them, algorithms to solve key linear algebra problems for ballot tables and Fibonacci matrices with high relative accuracy are derived.
Jorge Ballarín, Jorge Delgado, J. M. Peña   +2 more
wiley   +1 more source

An Inverse Source Technique as a Preliminary Tool to Localize Persons in Indoor Spaces

Mathematical Methods in the Applied Sciences, Volume 49, Issue 1, Page 304-320, 15 January 2026.
ABSTRACT This paper considers an inverse heat source localization problem with applications to indoor person localization from temperature measurements. In particular, this inverse problem consists in the reconstruction of the intensity and position of heat sources from observed temperature data.
Simonetta Boria, Nadaniela Egidi, Lorella Fatone, Josephin Giacomini, Pierluigi Maponi, Riccardo Piombin   +5 more
wiley   +1 more source

Symplectic groupoids and Poisson electrodynamics

Journal of High Energy Physics
We develop a geometric approach to Poisson electrodynamics, that is, the semi-classical limit of noncommutative U(1) gauge theory. Our framework is based on an integrating symplectic groupoid for the underlying Poisson brackets, which we interpret as the
Vladislav G. Kupriyanov, Alexey A. Sharapov, Richard J. Szabo   +2 more
doaj   +1 more source

Non-commutative geometry and the standard model vacuum

, 2006
The space of Dirac operators for the Connes-Chamseddine spectral action for the standard model of particle physics coupled to gravity is studied. The model is extended by including right-handed neutrino states, and the S0-reality axiom is not assumed ...
Carminati L., Chamseddine A. H., Gilkey P., Gracia-Bondia J. M., John W. Barrett, Rachel A. Dawe Martins, Schelp R.   +6 more
core   +3 more sources

Quantum noncommutative ABJM theory: first steps

Journal of High Energy Physics, 2018
We introduce ABJM quantum field theory in the noncommutative spacetime by using the component formalism and show that it is N $$ \mathcal{N} $$ = 6 supersymmetric. For the U(1) κ × U(1)−κ case, we compute all one-loop 1PI two and three point functions in
Carmelo P. Martin, Josip Trampetic, Jiangyang You   +2 more
doaj   +1 more source

Non-commutative ADE geometries as holomorphic wave equations

, 2005
Borrowing ideas from the relation between classical and quantum mechanics, we study a non-commutative elevation of the ADE geometries involved in building Calabi-Yau manifolds.
Abdellah Sebbar, Adil Belhaj, Belhaj, Belhaj, Belhaj, Belhaj, Belhaj, Bennai, Berenstein, El Hassan Saidi, Gradshteyn, Haddou, Haddou, Hori, Jørgen Rasmussen, Katz, Katz, Kim, Saidi, Seiberg   +19 more
core   +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

A fuzzy bipolar celestial sphere

Journal of High Energy Physics, 2019
We introduce a non-commutative deformation of the algebra of bipolar spherical harmonics supporting the action of the full Lorentz algebra. Our construction is close in spirit to the one of the non-commutative spherical harmonics associated to the fuzzy ...
Francesco Alessio, Michele Arzano
doaj   +1 more source

Semidefinite programming in matrix unknowns which are dimension free

, 2011
One of the main applications of semidefinite programming lies in linear systems and control theory. Many problems in this subject, certainly the textbook classics, have matrices as variables, and the formulas naturally contain non-commutative polynomials
Helton, J. William, Klep, Igor, McCullough, Scott   +2 more
core   +1 more source