Results 41 to 50 of about 1,470,168 (332)
Electric-magnetic Duality in Noncommutative Geometry [PDF]
, 1997 The structure of S-duality in U(1) gauge theory on a 4-manifold M is examined using the formalism of noncommutative geometry. A noncommutative space is constructed from the algebra of Wilson-'t Hooft line operators which encodes both the ordinary ...
Lizzi, Fedele, Szabo, Richard J.
core +3 more sources
, 2014 We consider photometric reverberation mapping, where the nuclear continuum variations are monitored via a broad-band filter and the echo of emission line clouds of the broad line region (BLR) is measured with a suitable narrow-band (NB) filter.
Bruckmann, C. +9 more
core +1 more source
Covariant Space-Time Line Elements in the Friedmann–Lemaitre–Robertson–Walker Geometry
Axioms, 2022 Most quantum gravity theories quantize space-time on the order of Planck length (ℓp ). Some of these theories, such as loop quantum gravity (LQG), predict that this discreetness could be manifested through Lorentz invariance violations (LIV) over ...
David Escors, Grazyna Kochan
doaj +1 more source
On organizing principles of Discrete Differential Geometry. Geometry of spheres
, 2006 Discrete differential geometry aims to develop discrete equivalents of the geometric notions and methods of classical differential geometry. In this survey we discuss the following two fundamental Discretization Principles: the transformation group ...
Bobenko, Alexander I., Suris, Yuri B.
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International Journal of Adaptive Control and Signal Processing, EarlyView., 2023 Summary In this contribution, we propose a detailed study of interpolation‐based data‐driven methods that are of relevance in the model reduction and also in the systems and control communities. The data are given by samples of the transfer function of the underlying (unknown) model, that is, we analyze frequency‐response data.
Quirin Aumann, Ion Victor Gosea
wiley +1 more source
Geometry-dependent electrostatics near contact lines
, 2001 Long-ranged electrostatic interactions in electrolytes modify their contact angles on charged substrates in a scale and geometry dependent manner. For angles measured at scales smaller than the typical Debye screening length, the wetting geometry near ...
A. A. Darhuber +18 more
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Silhouette and spectral line profiles in the special modification of the Kerr black hole geometry generated by quintessential fields [PDF]
, 2016 We study optical effects in quintessential Kerr black hole spacetimes corresponding to the limiting case of the equation-of-state parameter $\omega_{q}=-1/3$ of the quintessence.
Schee, Jan, Stuchlik, Zdenek
core +2 more sources
Algorithmic Modified Denavit–Hartenberg Modeling for Robotic Manipulators Using Line Geometry
Applied SciencesThis paper proposes a kinematic modeling method for robotic manipulators by extracting the modified Denavit–Hartenberg (MDH) parameters using line geometry.
Minchang Sung, Youngjin Choi
doaj +1 more source
JOHME: Journal of Holistic Mathematics Education, 2022 The studies on the worked-out examples teaching approach (WOETA) have been investigated globally and in South Africa, showing gains in learners' performance. This study reports on the Euclidean geometry short learning programme (EGSLP), which used worked-
Msebenzi Rabaza, Joleen Hamilton
doaj +1 more source
Geometry of straight lines pencils
Facta universitatis - series: Architecture and Civil Engineering, 2002 This paper considers a pencil of straight Unes in the Euclidean plane as well as the same pencil of straight lines in the projective plane where the projective geometry model M" is defined with its points forming the sets of (n-l) collinear points, whose supporting straight lines belong to the considered pencil of straight lines.
Milan Janic, Dejan Tanikic
openaire +4 more sources