Results 11 to 20 of about 3,447,966 (227)
Infinitesimal symmetries in contact Hamiltonian systems
, 2021 In this paper, we extend the well-known Noether theorem for Lagrangian systems to contact Lagrangian systems. We introduce a classification of infinitesimal symmetries and obtain the corresponding dissipated quantities. We notice that in contact dynamics,
León, Manuel de +1 more
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H-contact semi-Riemannian manifolds [PDF]
, 2013 We characterize H-contact semi-Riemannian manifolds (i.e., contact semi-Riemannian manifolds whose Reeb vector field ξ is harmonic) by the condition that ξ is a Ricci eigenvector. We then investigate how H-contact semi-Riemannian manifolds are related to
CALVARUSO, Giovanni, PERRONE, Domenico
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Infinitesimal Time Reparametrisation and Its Applications [PDF]
, 2022 A geometric approach to Sundman infinitesimal time-reparametrisation is given and some of its applications are used to illustrate the general theory. Special emphasis is put on geodesic motions and systems described by mechanical type Lagrangians.
Cariñena, J. F. +8 more
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On Lie algebras of generators of infinitesimal symmetries of almost-cosymplectic-contact structures [PDF]
, 1996 summary:We study Lie algebras of generators of infinitesimal symmetries of almost-cosymplectic-contact structures of odd dimensional manifolds. The almost-cosymplectic-contact structure admits on the sheaf of pairs of 1-forms and functions the structure ...
Janyška Josef +3 more
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Infinitesimal contact transformations and their applications to abstract growth patterns [PDF]
Quarterly of Applied Mathematics, 1980 Several abstract mathematical models of two-dimensional objects or “organisms” are introduced. The objects are abstractions, created by the combination of pattern-theoretic generators. They are deformed by what are shown to be infinitesimal contact transformations.
openaire +1 more source
Pseudo-Sasakian manifolds endowed with a contact conformal connection
International Journal of Mathematics and Mathematical Sciences, 1986 Pseudo-Sasakian manifolds M˜(U,ξ,η˜,g˜) endowed with a contact conformal connection are defined.
Vladislav V. Goldberg, Radu Rosca
doaj +1 more source
From infinitesimal harmonic transformations to Ricci solitons [PDF]
, 2013 summary:The concept of the Ricci soliton was introduced by R. S. Hamilton. The Ricci soliton is defined by a vector field and it is a natural generalization of the Einstein metric.
Mikeš, Josef +2 more
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Conformal Classification of (k, μ)-Contact Manifolds [PDF]
, 2010 First we improve a result of Tanno that says If a conformal vector field on a contact metric manifold M is a strictly infinitesimal contact transformation, then it is an infinitesimal automorphism of M by waiving the strictness in the hypothesis ...
Sharma, Ramesh, Vrancken, Luc
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On derivative-dependent infinitesimal deformations of differentiable maps
, 1980 We study, by means of flows in jet bundles, infinitesimal deformations of germs of b∞ maps ƒ:Rn→Rm that depend on a finite number of derivatives of these maps.
Otterson, Paul, Svetlichny, George
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FEBS Open Bio, EarlyView.In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey +4 more
wiley +1 more source