Results 61 to 70 of about 9,449 (213)
Classical observer form for discrete-time nonlinear system: MIMO case [PDF]
Proceedings of the Estonian Academy of SciencesThe paper addresses the problem of transforming multi-input multi-output discrete-time nonlinear state equations into the classical observer form using state transformation.
Arvo Kaldmäe +4 more
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Fluid-electromagnetic helicities and knotted solutions of the fluid-electromagnetic equations
Journal of High Energy Physics, 2022 In this paper we consider an Euler fluid coupled to external electromagnetism. We prove that the Hopfion fluid-electromagnetic knot, carrying fluid and electromagnetic (EM) helicities, solves the fluid dynamical equations as well as the Abanov Wiegmann ...
Horatiu Nastase, Jacob Sonnenschein
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Geometric Studies on Mittag-Leffler Type Function Involving a New Integrodifferential Operator
Mathematics, 2022 The generalized exponential function in a complex domain is called the Mittag-Leffler function (MLF). The implementations of MLF are significant in diverse areas of science. Over the past few decades, MLF and its analysis with generalizations have become
F. Ghanim +3 more
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Generalized Toda field theories [PDF]
Nuclear Physics B, 1995 In this paper we introduce a unified approach to Toda field theories which allows us to formulate the classes of $A_n$, $B_n$ and $C_n$ models as unique models involving an arbitrary continuous parameter $ν$. For certain values of $ν$, the model describes the standard Toda theories.
Brink, Lars, Vasiliev, Mikhail A.
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On a class of selection rules without group actions in field theory and string theory
SciPost PhysicsWe discuss a class of selection rules which i) do not come from group actions on fields, ii) are exact at tree level in perturbation theory, iii) are increasingly violated as the loop order is raised, and iv) eventually reduce to selection rules ...
Justin Kaidi, Yuji Tachikawa, Hao Y. Zhang
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Tourism Research Frontiers: beyond the boundaries of Knowledge
PASOS Revista de Turismo y Patrimonio Cultural, 2015 This critical book review scrutinizes the recent project of Donna Chambers & Tijana Rakic, entitled Tourism research frontiers. As the name indicates, this book explores the needs of finding new themes of investigations in tourism fields in a every ...
Maximiliano Emanuel Korstanje
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Intersections of Real Closed Fields [PDF]
, 1980 In this paper we wish to study fields which can be written as intersections of real closed fields. Several more restrictive classes of fields have received careful study (real closed fields by Artin and Schreier, hereditarily euclidean fields by Prestel ...
Thomas C. Craven
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Matrix and tensor witnesses of hidden symmetry algebras
Journal of High Energy Physics, 2023 Permutation group algebras, and their generalizations called permutation centralizer algebras (PCAs), play a central role as hidden symmetries in the combinatorics of large N gauge theories and matrix models with manifest continuous gauge symmetries ...
Sanjaye Ramgoolam, Lewis Sword
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Discrete Helmholtz Decompositions of Piecewise Constant and Piecewise Affine Vector and Tensor Fields [PDF]
Discrete Helmholtz decompositions dissect piecewise polynomial vector fields on simplicial meshes into piecewise gradients and rotations of finite element functions.
Schedensack, Mira +2 more
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Nonlinear fields in generalized cosmologies [PDF]
Physical Review D, 2016 6 pages, 2 figures.
Fasiello, Matteo, Vlah, Zvonimir
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