磁物理量与镜面对称

Magnetic Physical Variables and Mirror Symmetry

讨论磁物理量与镜面对称之间的关系，得到了矢势Ａ（ｔ）与磁感应强度矢量Ｂ（ｔ）的镜面特性。应用镜面对称得到两个有用的定理，将定理应用到具体的电流中，可获得磁场方向，该方法比其它一些方法方便。给出了两个典型实例以说明镜面对称的作用，作法是寻找电流系统的镜面对称，将镜面对称电流分为两个镜面对称电流或反向映象电流，即可应用定理判定磁场。

The relationship between magnetic physical variables and mirror symmery is examined. The reflection properties of the potential vector (t) and the magnetic induction (t) are obtained. Using these properties in some simple circuits, the magnetic field direction can be obtained. This method is more convenient than others. Two examples to illustrate the role of the mirror symmetry are gaven. Partitioning a mirror symmetric current into mirror or inverted mirror images, then the magnetic field can be justified by applying lemma.