Results 21 to 30 of about 81,221 (296)

Multilocal invariants for the classical groups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
Multilocal higher-order invariants, which are higher-order invariants defined at distinct points of representation space, for the classical groups are derived in a systematic way.
Paul F. Dhooghe
doaj   +1 more source

Douglas' Factorization Theorem and Atomic System in Hilbert Pro-$C^{\ast}$-Modules [PDF]

open access: yesSahand Communications in Mathematical Analysis
In the present paper, we introduce  the generalized inverse operators, which have an exciting role in operator theory. We establish Douglas' factorization theorem type  for  the Hilbert pro-$C^{\ast}$-module.We introduce the notion of atomic system and ...
Mohamed Rossafi   +2 more
doaj   +1 more source

Design of developable surfaces using the given data points

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2021
Many products such as ships, buildings, and clothes contain developable surfaces generated by sweeping a straight line along a three-dimensional curve.
Kotaro YOSHIDA   +4 more
doaj   +1 more source

ON FAMILIES IN DIFFERENTIAL GEOMETRY [PDF]

open access: yesInternational Journal of Geometric Methods in Modern Physics, 2013
Families of objects appear in several contexts, like algebraic topology, theory of deformations, theoretical physics, etc. An unified coordinate-free algebraic framework for families of geometrical quantities is presented here, which allows one to work without introducing ad hoc spaces, by using the language of differential calculus over commutative ...
openaire   +3 more sources

Physics-to-Geometry Transformation to Construct Identities between Reynolds Stresses

open access: yesMathematics, 2023
Modeling has become firmly established as a methodology to close the Reynolds-averaged Navier–Stokes (RANS) equations, owing to theoretical and empirical efforts towards a complete formulation of the Reynolds stress tensor and, recently, breakthroughs in
Sungmin Ryu
doaj   +1 more source

A Differential-Geometric Approach to Quantum Ignorance Consistent with Entropic Properties of Statistical Mechanics

open access: yesEntropy, 2023
In this paper, we construct the metric tensor and volume for the manifold of purifications associated with an arbitrary reduced density operator ρS. We also define a quantum coarse-graining (CG) to study the volume where macrostates are the manifolds of ...
Shannon Ray   +3 more
doaj   +1 more source

Input-output Feedback Linearization Control for SM-PMSM [PDF]

open access: yesE3S Web of Conferences, 2023
This paper introduces a velocity control strategy for Surface-Mounted Permanent Magnet Synchronous Motors SM-PMSM using exact linearization and input-output decoupling techniques, which are rooted in the principles of differential geometry.
Abdelhamid Senhaji   +4 more
doaj   +1 more source

Differential Geometry of Ice Flow

open access: yesFrontiers in Earth Science, 2018
Flowlines on ice sheets and glaciers form complex patterns. To explore their role in ice routing and extend the language for studying such patterns, we develop a theory of flow convergence and curvature in plan view.
Felix S. L. Ng   +2 more
doaj   +1 more source

Suitable model for the calculation of the correlation between the real and the average specific heat capacity and possibilities of its application [PDF]

open access: yesHemijska Industrija, 2013
Starting from the definition of the average specific heat capacity for chosen temperature range, the analytic dependence between the real and the mean specific heat capacities is obtained using differential and integral calculation.
Pejović Branko B.   +3 more
doaj   +1 more source

Differential geometry of collective models

open access: yesAIMS Mathematics, 2019
The classical astrophysical theory of Riemann ellipsoids and the quantum nuclear theory of Bohr and Mottelson share a common mathematical foundation in terms of the differential geometry of a principal bundle ${\cal P}$ and its associated vector bundle E,
George Rosensteel
doaj   +1 more source

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