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Distinguished Torsion, Curvature and Deflection Tensors in the Multi-Time Hamilton Geometry  [PDF]
Gheorghe Atanasiu,Mircea Neagu
Mathematics , 2008,
Abstract: The aim of this paper is to present the main geometrical objects on the dual 1-jet bundle $J^{1*}(\cal{T},M)$ (this is the polymomentum phase space of the De Donder-Weyl covariant Hamiltonian formulation of field theory) that characterize our approach of multi-time Hamilton geometry. In this direction, we firstly introduce the geometrical concept of a nonlinear connection $N$ on the dual 1-jet space $J^{1*}(\cal{T},M)$. Then, starting with a given $N$-linear connection $D$ on $J^{1*}(\cal{T},M)$, we describe the adapted components of the torsion, curvature and deflection distinguished tensors attached to the $N$-linear connection $D$.
On Quantization of Field Theories in Polymomentum Variables  [PDF]
I. V. Kanatchikov
Physics , 1998, DOI: 10.1063/1.57105
Abstract: Polymomentum canonical theories, which are manifestly covariant multi-parameter generalizations of the Hamiltonian formalism to field theory, are considered as a possible basis of quantization. We arrive at a multi-parameter hypercomplex generalization of quantum mechanics to field theory in which the algebra of complex numbers and a time parameter are replaced by the space-time Clifford algebra and space-time variables treated in a manifestly covariant fashion. The corresponding covariant generalization of the Schroedinger equation is shown to be consistent with several aspects of the correspondence principle such as a relation to the De Donder-Weyl Hamilton-Jacobi theory in the classical limit and the Ehrenfest theorem. A relation of the corresponding wave function (over a finite dimensional configuration space of field and space-time variables) to the Schroedinger wave functional in quantum field theory is examined in the ultra-local approximation.
Conservation Laws in Generalized Riemann-Silberstein Electrodynamics  [PDF]
Jan E. S. Bergman,Siavoush M. Mohammadi,Lars K. S. Daldorff,Bo Thidé,Tobia D. Carozzi,Roger L. Karlsson,Marcus Eriksson
Physics , 2008,
Abstract: Starting from positive and negative helicity Maxwell equations expressed in Riemann-Silberstein vectors, we derive the ten usual and ten additional Poincar{\'e} invariants, the latter being related to the electromagnetic spin, i.e., the intrinsic rotation, or state of polarization, of the electromagnetic fields. Some of these invariants have apparently not been discussed in the literature before.
Classical Electromagnetism as a Consequence of Coulomb's Law, Special Relativity and Hamilton's Principle and its Relationship to Quantum Electrodynamics  [PDF]
J. H. Field
Physics , 2005,
Abstract: It is demonstrated how all the mechanical equations of classical electrodynamics (CEM) may be derived from only Coulomb's inverse square force law, special relativity and Hamilton's Principle. The instantaneous nature of the Coulomb force in the centre-of-mass frame of two interacting charged objects, mediated by the exchange of space-like virtual photons, is predicted by QED. The interaction Lagrangian of QED is shown to be identical, in the appropriate limit, to the potential energy term in the Lorentz-invariant Lagrangian of CEM. A comparison is made with the Feynman-Wheeler action-at-a-distance formulation of CEM.
Induced gravitation as nonlinear electrodynamics effect  [PDF]
Alexander A. Chernitskii
Physics , 2002,
Abstract: The effect of induced Riemann geometry in nonlinear electrodynamics is considered. The possibility for description of real gravitation by this effect is discussed.
Distinguished Varieties  [PDF]
Jim Agler,John McCarthy
Mathematics , 2005,
Abstract: A distinguished variety is a variety that exits the bidisk through the distinguished boundary. We show that Ando's inequality for commuting matrix contractions can be sharpened to looking at the maximum modulus on a distinguished variety, not the whole bidisk. We show that uniqueness sets for extremal Pick problems on the bidisk always contain a distinguished variety.
Jet Riemann-Hamilton geometrization for the conformal deformed Berwald-Moor quartic metric depending on momenta  [PDF]
Alexandru Oana,Mircea Neagu
Mathematics , 2012,
Abstract: In this paper we expose on the dual 1-jet space J^{1*}(R,M^4) the distinguished (d-) Riemannian geometry (in the sense of d-connection, d-torsions, d-curvatures and some gravitational-like and electromagnetic-like geometrical models) for the (t,x)-conformal deformed Berwald-Moor Hamiltonian metric of order four.
Parametrizing distinguished varieties  [PDF]
Jim Agler,JOhn E. McCarthy
Mathematics , 2005,
Abstract: A distinguished variety is a variety that exits the bidisk through the distinguished boundary. We look at the moduli space for distinguished varieties of rank (2,2).
Generalized Tu Formula and Hamilton Structures of Fractional Soliton Equation Hierarchy  [PDF]
Guo-cheng Wu,Sheng Zhang
Physics , 2010, DOI: 10.1016/j.physleta.2011.08.040
Abstract: With the modified Riemann-Liouville fractional derivative, a fractional Tu formula is presented to investigate generalized Hamilton structure of fractional soliton equations. The obtained results can be reduced to the classical Hamilton hierachy of ordinary calculus.
Polynomials defining distinguished varieties  [PDF]
Greg Knese
Mathematics , 2009, DOI: 10.1090/S0002-9947-2010-05275-4
Abstract: Using a sums of squares formula for two variable polynomials with no zeros on the bidisk, we are able to give a new proof of a representation for distinguished varieties. For distinguished varieties with no singularities on the two-torus, we are able to provide extra details about the representation formula and use this to prove a bounded extension theorem.
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