arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0909.1493math-phmath.MP
收藏

电动力学N体问题解的存在唯一性

The Existence and Uniqueness of Solutions to N-Body Problem of Electrodynamics

Victor M. Bogdan

摘要:

根据费曼定律,给定$n$电荷相互作用。令$(r_j(t),v_j(t))$表示电荷的位置和速度$q_j.$。所有这些矢量的列表$y(t)$称为轨迹。具有连续导数的Lipschitz轨迹$x(t), (t\le0),$,其速度不超过某个极限速度$v<c,$,其中$c$表示光速,称为初始轨迹。一个局部Lipschitz轨迹$y(t)$被称为相对论容许的,如果它的速度保持在光速之下$c.$作者构造了一个轨迹的算子$Φ_{j}$,其值$Φ_j(y)(t)$是$R^3$到$R^3.$的线性变换轨迹$y$上的一个点$t=t_1$被称为奇异的,如果一些电荷在$t_1$时刻碰撞或者对于至少一个电荷的行列式为零,变换$Φ_j(y)(t_1).$主要结果如下:如果$x(t) (t\le0)$是具有非奇点$t=0,$的初始轨迹,则存在唯一的相对论容许轨迹$y(t),$,该相对论容许轨迹$y(t),$定义为在区间$I\subset < 0,\infty),$中扩展初始轨迹$x(t)$并具有以下性质。(1)轨迹$y$上没有点$t$是奇异的。(2)该轨迹表示根据费曼运动点电荷定律在电磁场诱导的洛伦兹力下的牛顿-爱因斯坦动量-力方程组的唯一解。(3)轨迹$y$表示系统的最大全局解。

英文摘要:

Given $n$ charges interacting with each other according to Feynman's law. Let $(r_j(t),v_j(t))$ denote the position and velocity of the charge $q_j.$ The list $y(t)$ of all such vectors is called a trajectory. A Lipschitzian trajectory $x(t), (t\le0),$ with continuous derivative, on which the velocities do not exceed some limiting velocity $v<c,$ where $c$ denotes the speed of light, is called an initial trajectory. A locally Lipschitzian trajectory $y(t)$ is called relativistically admissible if the velocities on it stay below the speed of light $c.$ The author constructs operators $Φ_{j}$ of a trajectory whose values $Φ_j(y)(t)$ are linear transformations of $R^3$ into $R^3.$ A point $t=t_1$ on a trajectory $y$ is called singular if either some of the charges collide at the time $t_1$ or the determinant is zero for at least one of the transformations $Φ_j(y)(t_1).$ The main result is the following: If $x(t) (t\le0)$ is an initial trajectory with nonsingular point $t=0,$ then there exists a unique relativistically admissible trajectory $y(t),$ defined for $t$ in an interval $I\subset < 0,\infty),$ extending the initial trajectory $x(t)$ and having the following properties. (1) No point $t$ on the trajectory $y$ is singular. (2) The trajectory represents a unique solution of the Newton-Einstein momentum-force system of equations under Lorentz forces induced by electromagnetic field in accord to Feynman's law for moving point charges. (3) The trajectory $y$ represents the maximal global solution of the system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑