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The Dirac's bra-ket formalism is generalized to finite-dimensional vector spaces with indefinite metric in a simple mathematical context similar to thatof the theory of general tensors where, in addition, scalar products are introduced with…

Mathematical Physics · Physics 2007-05-23 Ion I. Cotaescu

We show that additional solutions must be ignored (in differences of the Schrodinger and Klein-Gordon equations) in the Dirac equation, where usually passed the second order radial equation, called the reduced equation, instead of a system.…

General Physics · Physics 2017-08-01 Anzor Khelashvili , Teimuraz Nadareishvili

A peculiar representation of the Lorentz group is suggested as a starting point for a consistent approach to relativistic quantum theory.

High Energy Physics - Theory · Physics 2008-02-03 F. Antonuccio

This paper adapts the techniques of finite element exterior calculus to study and discretize the abstract Hodge-Dirac operator, which is a square root of the abstract Hodge-Laplace operator considered by Arnold, Falk, and Winther [Bull.…

Numerical Analysis · Mathematics 2019-04-22 Paul Leopardi , Ari Stern

We show that the covariant derivative of Dirac fermion fields in the presence of a general linear connection on a world manifold is universal for Einstein's, gauge and affine-metric gravitation theories.

General Relativity and Quantum Cosmology · Physics 2007-05-23 G. Giachetta , G. Sardanashvily

The relative index theorem is proved for general first-order elliptic operators that are complete and coercive at infinity over measured manifolds. This extends the original result by Gromov-Lawson for generalised Dirac operators as well as…

Analysis of PDEs · Mathematics 2022-10-31 Lashi Bandara

One of the main claims of the paper is that Dirac's calculus and broader theories of physics can be treated as theories written in the language of Continuous Logic. Establishing its true interpretation (model) is a model theory problem. The…

Logic · Mathematics 2024-10-04 Boris Zilber

We prove a central limit theorem (CLT) for the Frechet mean of independent and identically distributed observations in a compact Riemannian manifold assuming that the population Frechet mean is unique. Previous general CLT results in this…

Probability · Mathematics 2022-11-01 Thomas Hotz , Huiling Le , Andrew T. A. Wood

The Dirac equation is one of the most fundamental equations of modern physics. It is a spinor equation, but some tensor equivalents of the equation were proposed previously. Those equivalents were either nonlinear or involved several…

Quantum Physics · Physics 2024-08-21 Andrey Akhmeteli

We will consider the torsional completion of gravity for a background filled with Dirac matter fields, studying the weak-gravitational non-relativistic approximation, in view of an assessment about their effective phenomenology: we discuss…

General Relativity and Quantum Cosmology · Physics 2014-09-03 Luca Fabbri

The gravitational effects in the relativistic quantum mechanics are investigated. The exact Foldy-Wouthuysen transformation is constructed for the Dirac particle coupled to the static spacetime metric. As a direct application, we analyze…

General Relativity and Quantum Cosmology · Physics 2011-08-17 Yuri N. Obukhov

Differential geomtrical methods for deriving the Dirac equation in Curved Spacetime are presented. Einstein's field equation is applied in a novel manner; in the most current standard reference, Birrell and Davies, 1994 [1], the suggestions…

Mathematical Physics · Physics 2007-05-23 Joseph Saaty

We derive the relativistic energy spectrum for the modified Dirac equation by adding a harmonic oscillator potential where the coordinates and momenta are assumed to obey the commutation relation…

Quantum Physics · Physics 2015-10-21 B. J. Falaye , Shi-Hai Dong , K. J. Oyewumi , K. F. Ilaiwi , S. M. Ikhdair

Lambert's theorem (1761) on the elapsed time along a Keplerian arc drew the attention of several prestigious mathematicians. In particular, they tried to give simple and transparent proofs of it (see our timeline \S 9). We give two new…

Dynamical Systems · Mathematics 2020-10-29 Alain Albouy

In a recent work the authors prove the effective asymptotic Fermat's Last Theorem for the infinite family of fields $\mathbb{Q}(\zeta_{2^{r+2}})^+$ where $r \ge 0$. A crucial step in their proof is the following conjecture of Kraus. Let $K$…

Number Theory · Mathematics 2020-12-08 Nuno Freitas , Alain Kraus , Samir Siksek

Using various results from extremal set theory (interpreted in the language of additive combinatorics), we prove an asyptotically sharp version of Freiman's theorem in F_2^n: if A in F_2^n is a set for which |A + A| <= K|A| then A is…

Combinatorics · Mathematics 2007-05-23 Ben Green , Terence Tao

We speculate on the role of relativistic versions of delayed differential equations in fundamental physics. Relativistic invariance implies that we must consider both advanced and retarded terms in the equations, so we refer to them as…

High Energy Physics - Theory · Physics 2010-09-17 Michael Atiyah , Gregory W. Moore

Can any element in a sufficiently large finite field be represented as a sum of two $d$th powers in the field? In this article, we recount some of the history of this problem, touching on cyclotomy, Fermat's last theorem, and diagonal…

Number Theory · Mathematics 2020-12-17 Vitaly Bergelson , Andrew Best , Alex Iosevich

The Planck length is the minimum length which physical law do not fail. The Dirac delta function was created to deal with continuous range issue, and it is zero except for one point. Thus contradict the Planck length. Renormalization method…

General Physics · Physics 2020-01-03 Hua Zhang , Mingshun Yuan

Dirac's idea of taking the square root of constraints is applied to the case of extended objects concentrating on membranes in D=4 space-time dimensions. The resulting equation is Lorentz invariant and predicts an infinite hierarchy of…

High Energy Physics - Theory · Physics 2011-11-02 Maciej Trzetrzelewski