中国物理B ›› 1995, Vol. 4 ›› Issue (5): 337-343.doi: 10.1088/1004-423X/4/5/003
ZAFAR AHSAN
摘要: Using the null tetrad approach of Newman and Penrose, the symmetries of the electro-magnetic fields are investigated. It is found that null electromagnetic fields admit Maxwell collineation, and the existence of Ricci collineation and motion is possible only under certain conditions on the spin-coefficients.
中图分类号: (Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or classical fields)