Results 11 to 20 of about 716,407 (270)
Symmetry Reduction by Lifting for Maps [PDF]
Nonlinearity, 2011 We study diffeomorphisms that have one-parameter families of continuous symmetries. For general maps, in contrast to the symplectic case, existence of a symmetry no longer implies existence of an invariant.
Abraham R +17 more
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Symmetry Reduction of Quasi-Free States [PDF]
Journal of Mathematical Physics, 2008 Given a group-invariant quasi-free state on the algebra of canonical commutation relations (CCR), we show how group averaging techniques can be used to obtain a symmetry reduced CCR algebra and reduced quasi-free state.
C. G. Torre, Petz D.
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Discrete symmetries and nonlocal reductions [PDF]
Physics Letters A, 2020 12 ...
Metin Gürses +2 more
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Symmetry Reduction of States I
Journal of Noncommutative Geometry, 2023 We develop a general theory of symmetry reduction of states on (possibly non-commutative) *-algebras that are equipped with a Poisson bracket and a Hamiltonian action of a commutative Lie algebra g .
Philipp Schmitt, Matthias Schötz
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Symmetry Reduction of Fourier Kernels [PDF]
Journal of Computational Physics, 1998 The authors examine Fourier transforms of functions of several variables invariant under the group \(G= \text{SO}(d)\) of proper rigid rotations of the frame of \(N\) vectors \(\{x_i\}^N_{i= 1}\) in \(\mathbb{R}^d\). The Fourier transforms of these functions can be written as \[ F(k;t)= \int_{\mathbb{R}^{Nd}/G} K(k,x;t) f(x) d\mu(x), \] where \[ K(k,x ...
Samson, J. H., Evans, G. A.
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Entropy, 2020 A conditional Lie-Bäcklund symmetry method and differential constraint method are developed to study the radially symmetric nonlinear convection-diffusion equations with source.
Lina Ji, Rui Wang
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New symmetry reduction method for (1+1)-dimensional differential-difference equations
Frontiers in Physics, 2023 We propose a new symmetry reduction method for (1+1)-dimensional differential-difference equations (DDEs), namely, the λ-symmetry reduction method of solving ordinary differential equations is generalized to DDEs.
Jielin Lyu +3 more
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The symmetry reduction of variational integrals, complement [PDF]
Mathematica Bohemica, 2018 Some open problems appearing in the primary article on the symmetry reduction are solved. A new and quite simple coordinate-free definition of Poincaré-Cartan forms and the substance of divergence symmetries (quasisymmetries) are clarified.
Veronika Chrastinová, Václav Tryhuk
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Advances in Oral and Maxillofacial Surgery, 2022 To evaluate the effectiveness of reduction of the sphenozygomatic suture in zygomaticomaxillary complex fractures by orbital volume and facial symmetry analysis.
Taradevi Puthan Veetil Narayan +2 more
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Exact and approximate strategies for symmetry reduction in model checking [PDF]
, 2006 Symmetry reduction techniques can help to combat the state space explosion problem for model checking, but are restricted by the hard problem of determining equivalence of states during search.
Bouquet, Fabrice +2 more
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