Results 31 to 40 of about 12,066,635 (273)
Routhian reduction for quasi-invariant Lagrangians [PDF]
J. Math. Phys. 51(2) 2010, 2009 In this paper we describe Routhian reduction as a special case of standard symplectic reduction, also called Marsden-Weinstein reduction. We use this correspondence to present a generalization of Routhian reduction for quasi-invariant Lagrangians, i.e. Lagrangians that are invariant up to a total time derivative.
arxiv +1 more source
Recursions of Symmetry Orbits and Reduction without Reduction [PDF]
, 2011 We consider a four-dimensional PDE possessing partner symmetries mainly on the example of complex Monge-Amp\`ere equation (CMA). We use simultaneously two pairs of symmetries related by a recursion relation, which are mutually complex conjugate for CMA ...
Malykh, Andrei A., Sheftel, Mikhail B.
core +4 more sources
Journal of Physics A: Mathematical and Theoretical, 2011 Starting from basic identities of the group E8, we perform progressive reductions, namely decompositions with respect to the maximal and symmetric embeddings of E7xSU(2) and then of E6xU(1). This procedure provides a systematic approach to the basic identities involving invariant primitive tensor structures of various irreprs.
Marrani, Alessio +2 more
openaire +2 more sources
Reduction and construction of Poisson quasi-Nijenhuis manifolds with background [PDF]
, 2009 We extend the Falceto-Zambon version of Marsden-Ratiu Poisson reduction to Poisson quasi-Nijenhuis structures with background on manifolds. We define gauge transformations of Poisson quasi-Nijenhuis structures with background, study some of their ...
FLÁVIO CORDEIRO +4 more
core +2 more sources
Control-oriented implementation and model order reduction of a lithium-ion battery electrochemical model [PDF]
, 2019 The use of electrochemical models makes it computationally intractable for online implementation as the model is subject to a complicated mathematical structure including partial-differential equations (PDE).
Li, Liuying +3 more
core +1 more source
Boundary reduction formula [PDF]
, 2002 An asymptotic theory is developed for general non-integrable boundary quantum field theory in 1+1 dimensions based on the Langrangean description. Reflection matrices are defined to connect asymptotic states and are shown to be related to the Green ...
Bajnok, Z., Bohm, G., Takacs, G.
core +2 more sources
Energies, 2018 Composite insulators are widely used in modern power systems to provide electrical insulation and mechanical support for transmission lines and substations.
Jiazheng Lu +4 more
doaj +1 more source
Reduction of Vaisman structures in complex and quaternionic geometry [PDF]
J. Geom. Phys. 56 (2006), no. 12, 2501--2522, 2005 We consider locally conformal Kaehler geometry as an equivariant (homothetic) Kaehler geometry: a locally conformal Kaehler manifold is, up to equivalence, a pair (K,\Gamma) where K is a Kaehler manifold and \Gamma a discrete Lie group of biholomorphic homotheties acting freely and properly discontinuously.
arxiv +1 more source
Angewandte Chemie International Edition, 2019 AbstractThe many applications of photon upconversion—conversion of low‐energy photons into high‐energy photons—raises the question of the possibility of “electron upconversion”. In this Review, we illustrate how the reduction potential can be increased by using the free energy of exergonic chemical reactions.
Mikhail A. Syroeshkin +5 more
openaire +6 more sources