And a study of variational problem has been done in the general extremal field, and a direct proof of the general variational formulation has been got. 且在一般极值曲线场中研究了变分问题,得到了一般变分公式的直接证明。
Experimental g_c values are given for most of the extremal orbits on the lead Fermi surface for high-symmetry directions of [ 100], [ 110], and [ 111] of the magnetic field. 文中给出了在磁场平行于[100],[110],[111]三个高对称方向上费密面各极值轨道上的gc实验值。